Google PageRank: What Do We Know About It?

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Everybody is using it, but (almost) nobody really knows how it works. Google PageRank is probably one of the most important algorithms ever developed for the Web. With billions of existing pages and millions of pages generated every day, the search issue in the Web is more complex than you probably think it is. PageRank, only one of hundreds of factors used by Google to determine best search results, helps to keep our search clean and efficient. But how is it actually done? How does Google PageRank work, which factors do have an impact on it and which don’t? And what do we really know about PageRank?

In this article we put the facts straight.

Over the last weeks we’ve done an extensive research and selected dozens of facts and suggestions about PageRank, which seem to be true in practice. Besides, we’ve collected academic papers related to the issue – such as scientific proposals for better search results (such as Topic-Sensitive PageRank); you’ll also find references to mathematical background of PageRank as well as 16 useful PageRank tools you can use to analyze und track the ranking of your web-projects.

Update: we’d like to apologize for some misleading facts we’ve initially included in this article. We’ve re-checked the sources and inaccurate or incomplete data. The .pdf-file won’t contain any mistakes. Thanks to all the readers who’ve pointed us to the mistakes (particularly Dan Grossman and Reuben Yau191).

  • Update: We are going to publish the .pdf-version of this post soon, so subscribe to our RSS-feed2 to keep track on our next posts.
  • You don’t have to read the whole article. Most important facts are selected in the beginning of the post as a brief summary.
  • You might be interested in reading our article Google AdSense: Facts, FAQs and Tools3, which should provide you with the most important facts, tools and resources about Google AdSense.
  • Update (28.07.2007): Spanish version4 of this article is available (thanks, Juan Manuel Lemus).

Google PageRank

Summary: How Does PageRank Work?

  1. PageRank is only one of numerous methods Google uses to determine a page’s relevance or importance.
  2. Google interprets a link from page A to page B as a vote, by page A, for page B. Google looks not only at the sheer volume of votes; among 100 other aspects it also analyzes the page that casts the vote. However, these aspects don’t count, when PageRank is calculated.
  3. PageRank is based on incoming links, but not just on the number of them – relevance and quality are important (in terms of the PageRank of sites, which link to a given site).
  4. PR(A) = (1-d) + d(PR(t1)/C(t1) + … + PR(tn)/C(tn)). That’s the equation that calculates a page’s PageRank.
  5. Not all links weight the same when it comes to PR.
  6. If you had a web page with a PR8 and had 1 link on it, the site linked to would get a fair amount of PR value. But, if you had 100 links on that page, each individual link would only get a fraction of the value.
  7. Bad incoming links don’t have impact on Page Rank.
  8. Ranking popularity considers site age, backlink relevancy and backlink duration. PageRank doesn’t.
  9. Content is not taken into account when PageRank is calculated.
  10. PageRank does not rank web sites as a whole, but is determined for each page individually.
  11. Each inbound link is important to the overall total. Except banned sites, which don’t count.
  12. PageRank values don’t range from 0 to 10. PageRank is a floating-point number.
  13. Each Page Rank level is progressively harder to reach. PageRank is believed to be calculated on a logarithmic scale.
  14. Google calculates pages PRs permanently, but we see the update once every few months (Google Toolbar).

Summary: Impact on Google PageRank

  1. Frequent content updates don’t improve Page Rank automatically. Content is not part of the PR calculation.
  2. High Page Rank doesn’t mean high search ranking.
  3. DMOZ and Yahoo! Listings don’t improve Page Rank automatically.
  4. .edu and .gov-sites don’t improve Page Rank automatically.
  5. Sub-directories don’t necessarily have a lower Page Rank than root-directories.
  6. Wikipedia links don’t improve PageRank automatically (update: but pages which extract information from Wikipedia might improve PageRank).
  7. Links marked with nofollow-attribute don’t contribute to Google PageRank.
  8. Efficient internal onsite linking has an impact on PageRank.
  9. Related high ranked web-sites count stronger. But: “a page with high PageRank may actually pass you less if it has more links, because it’s spread too thin.” [RY5]
  10. Links from and to high quality related sites have an impact on Page Rank.
  11. Multiple votes to one link from the same page cost as much as a single vote.

1.1. What is PageRank?

  • “PageRank is [only] one of the methods Google uses to determine a page’s relevance or importance.” [PageRank Explained Correctly6]
  • “Google uses many factors in ranking. Of these, the PageRank algorithm might be the best known. PageRank evaluates two things: how many links there are to a web page from other pages, and the quality of the linking sites. With PageRank, five or six high-quality links from websites such as www.cnn.com and www.nytimes.com would be valued much more highly than twice as many links from less reputable or established sites.” [Google Librarian Central257]
  • “PageRank has only ever been an approximation of the quality of a web page and has never had anything to do with the measuring of the topical relevance of a web page. Topical relevance is measured with link context and on-page factors such as keyword density, title tag, and everything else.” [PageRank: An Essay8]

1.2. How Does PageRank work?

  • No one really knows.“No one knows for sure how PageRank is currently calculated by Google.” [Google PageRank Explained]
  • PR(A) = (1-d) + d(PR(t1)/C(t1) + … + PR(tn)/C(tn)). “That’s the equation that calculates a page’s PageRank. In the equation ‘t1 – tn’ are pages linking to page A, ‘C’ is the number of outbound links that a page has and ‘d’ is a damping factor, usually set to 0.85.”
  • We can think of it in a simpler way: a page’s PageRank = 0.15 + 0.85 * (a “share” of the PageRank of every page that links to it). “share” = the linking page’s PageRank divided by the number of outbound links on the page. A page “votes” an amount of PageRank onto each page that it links to. The amount of PageRank that it has to vote with is a little less than its own PageRank value (its own value * 0.85). This value is shared equally between all the pages that it links to.” [Google’s Page Rank119]
  • “The core Google PageRank algorithm “distributes” it’s established PR across all of the outbound links. Put differently, if you had a web page with a PR8 and had 1 link on it, the site linked to would get a fair amount of PR value. But, if you had 100 links on that page, each individual link would only get a fraction of the value.” [The Importance of PageRank10]
  • “From this, we could conclude that a link from a page with PR4 and 5 outbound links is worth more than a link from a page with PR8 and 100 outbound links. The PageRank of a page that links to yours is important but the number of links on that page is also important. The more links there are on a page, the less PageRank value your page will receive from it.” [Google’s Page Rank119]
  • “PageRank [..] uses the link structure as an indicator of an individual page’s value. Google interprets a link from page A to page B as a vote, by page A, for page B. Google looks at considerably more than the sheer volume of votes, or links a page receives; e.g. it also analyzes the page that casts the vote. Votes cast by pages that are themselves “important” weigh more heavily and help to make other pages “important.” [Google: Technology12]
  • Not all links weight the same when it comes to PR. So an ‘important’ page linking to you gives you more PR than a ‘less important’ one. […] A factor in PR propagation is the number of out-links the ‘voting’ page have. So a PR4 page with only one out-link on it might give you more weight than a PR5 page with 100 out-links on it. A typical example here would be the famous milliondollarhomepage. This page is PR7 page with hunderds of out-links therefore its weight is would contribute very little to your page PR.” [Google PageRank Explained]
  • Each Page Rank level is progressively harder to reach. “PageRank is logarithmic in its calculation. In the same way that the earthquake Richter scale is exponential in calculation, so too is the mathematics behind Google PageRank. It takes one step to move from a PR0 to a PR1, it takes a few more steps to PR3, it takes even more steps to PR4, and many more steps again to PR5, and so one.” [Google Page Rank FAQ13]

Google PageRank Explained14
[via einfach-persoehnlich15]

  • “PageRank does not rank web sites as a whole, but is determined for each page individually. Further, the PageRank of page A is recursively defined by the PageRanks of those pages which link to page A.” [The Page Rank algorithm16]
  • “Google combines PageRank with sophisticated text-matching techniques to find pages that are both important and relevant to user’s search. Google examines all aspects of the page’s content (and the content of the pages linking to it) to determine if it’s a good match for user’s queries.” [What Is Google PageRank?54534017]
  • “Google calculates pages PRs once every few months (PR update). After a PR update is done, all pages are assigned a new PR by Google and you will have this PR until a new PR update is done. New sites that were just launched will have a PR of 0 until an update is done by Google so that they are assigned an appropriate PR.” [Google PageRank Explained]
  • “Google PageRank is calculated all the time, but what we see in the Google Toolbar 18 (or other online PR tools) is a snapshot in time which is updated every 3 months or so.” [Reuben Yau191]
  • PageRank values don’t range from 0 to 10. PageRank is a floating-point number. “It’s more accurate to think of it as a floating-point number. Certainly our internal PageRank computations have many more degrees of resolution than the 0-10 values shown in the toolbar.” [Matt Cutts20]
  • “We’re sure that their curve is similar to an exponential curve with each new “plateau” being harder to reach than the last. I have personally done some research into this21, and so far the results point to an exponential base of 4. So a PR of 6 is 4 times as difficult to attain as a PR of 5. [..] The difference between a high PR of 6, and a low PR of 6, could be hundreds or thousands of links.” [Top 10 Google Myths Revealed362422]
  • “PageRank is believed to be calculated on a logarithmic scale. What this roughly means is that the difference between PR4 and PR5 is likely 5-10 times than the difference between PR3 and PR4. So, there are likely over a 100 times as many web pages with a PageRank of 2 than there are with a PageRank of 4. This means that if you get to a PageRank of 6 or so, you’re likely well into the top 0.1% of all websites out there. If most of your peer group is straggling around with a PR2 or PR3, you’re way ahead of the game.” [Importance of Google PageRank23]
  • “The fact is that PageRank is based on incoming links, but not just on the number of them. Instead PageRank is based on the value of your incoming links. To find the value of an incoming link look at the PR of the source page, and divide it by the number of links on that page. It’s very possible to get a PR of 6 or 7 from only a handful of incoming links if your links are “weighty” enough.” [Top 10 Google Myths Revealed362422]
  • Google tries to find pages that are both reputable and relevant. If two pages appear to have roughly the same amount of information matching a given query, we’ll usually try to pick the page that more trusted websites have chosen to link to. Still, we’ll often elevate a page with fewer links or lower PageRank if other signals suggest that the page is more relevant. For example, a web page dedicated entirely to the civil war is often more useful than an article that mentions the civil war in passing, even if the article is part of a reputable site such as Time.com.” [Google Librarian Central257]
  • Links don’t give PR away, they are votes. “When a page votes its PageRank value to other pages, its own PageRank is not reduced by the value that it is voting. The page doing the voting doesn’t give away its PageRank and end up with nothing. It isn’t a transfer of PageRank. It is simply a vote according to the page’s PageRank value.” [Page Rank Explained26]
  • “We know from the paper “The Anatomy of a Large-Scale Hypertextual Web Search Engine” (Paper) that the PageRank of a Web page is a number calculated using a recursive algorithm in which the page receives a share of the PageRank of each page that links to it.” [Google PageRank3927]
  • Crawlers don’t analyze web-sites permanently. “It often takes two full monthly updates for all of your incoming links to be discovered, counted, calculated and displayed as backlinks.” [Google FAQ28]

1.3. Which factors do have an impact on PageRank?

  • Each inbound link is important to the overall total. Except banned sites. “PageRank is a form of a voting system. A link to a page is a vote for that page. Higher PageRank pages are viewed by Google as more important. Their votes are given more value by Google — much more value, in some cases. In general, the more voting links, the stronger the PageRank.” [Google PageRank FAQ29]
  • Adding new pages can decrease Page Rank. “The effect is that, whilst the total PageRank in the site is increased, one or more of the existing pages will suffer a PageRank loss due to the new page making gains. Up to a point, the more new pages that are added, the greater is the loss to the existing pages. With large sites, this effect is unlikely to be noticed but, with smaller ones, it probably would.” [PageRank Explained4830]
  • Page Rank can decrease. “You can lose some important links that are no longer linking to your site. PR loss can also occur if some of your linking partners also experience a drop in their own PR, possibly setting off a chain reaction of lower PageRank all through the immediate linking network.” [Google PageRank FAQ31]
  • Links from and to high quality related sites are important. “The more closely related the pages, the higher the PageRank amount transferred.” “Linking to high quality sites shows the search engines your site is very useful to your visitors. Unless your site has been around for years and is well established and trusted by Google, this factor will have an adverse effect on your site’s overall ranking. Linking only to high quality content sites will give your site an edge over your competition.” [Let Google’s Algorithm Show You The Traffic525032, FAQ33]
  • Incoming Links from popular sites are important. If pages linking to you have a high PageRank then your page gains some part of their reputation.
  • Site can be banned if it links to banned sites. “Be extremely careful of any out-going links from your site. Don’t link to bad neighborhoods (link farms, banned sites, etc.) Google will penalize you for bad links so always check the PageRank of the sites you’re linking to from your site.” [SiteProNews34]
  • Illegal activities will penalize your PageRank and possibly ban your site from Google. “Hidden text, deceptive redirects, cloaking, automated link exchanges, or anything else against Google’s quality guidelines35” can ban your site from Google.
  • Myth: the higher your google PageRank, the better the results. “While pages with a higher PageRank do tend to rank better, it is perfectly normal for a site to appear higher in the results listings even though it has a lower PageRank than competing pages. [..] Google examines the context of your incoming links, and only those links that relate to the specific keyword being searched on will help you achieve a higher ranking for that keyword.” [Top 10 Google Myths Revealed362422]
  • Related high ranked web-sites count stronger (or don’t they?). “One-way inbound links from websites with topics that are related to your website’s topic will help you gain a higher Page Rank.” Other one-way inbound links from pages with high page rank but unrelated topics do help a little, but not nearly as much. [What Is Page Rank?3837]
  • Different pages from a site can have different Page Rank. “Search engines crawl and index webpages not websites, that is why your page rank may vary from page to page within your website.” [What Is Page Rank?3837]

1.4. Which factors don’t have an impact on PageRank?

  • Frequent content updates don’t improve PR automatically.” Although Google might send crawlers more frequently to analyze your site, what is more significant are links pointing to you.
  • “Content is not taken into account when PageRank is calculated. Content is taken into account when you actually perform a search for specific search terms.” [Google PageRank3927]
  • “High PageRank does NOT guarantee a high search ranking for any particular term. If it did, then PR10 sites like Adobe would always show up for any search you do. They don’t.” [What Is Google PageRank?54534017
  • Google considers site age, backlink relevancy and backlink duration. PageRank doesn’t. If backlink isn’t relevant, it won’t weight much.
  • Wikipedia Links don’t improve Page Rank. “Wikipedia implemented a no-follow rule, indicating that outbound links should not be followed by search engine spiders.” [A Survival Guide to SEO & Wikipedia41]
  • Listing in DMOZ and Yahoo! doesn’t give your site a special PR Bonus. “Google uses Open Directory Project (DMOZ.org), to power its directory. Coupling that fact with the observation that sites listed in DMOZ often get decent and inexplicable PageRank boosts, has lead many to conclude that Google gives a special bonus to sites listed in DMOZ. This is simply not true. The only bonus gained from being in DMOZ is the same bonus a site would achieve from being linked to by any other site.” However, DMOZ data is used by hundreds of sites.” [Top 10 Google Myths Revealed42]
  • Sub-directories don’t necessarily have a lower Page Rank than root-directories. Depending on the popularity of a web-site your subdirectories can have a higher PageRank than the root pages.
  • Meta-Tags don’t improve PageRank. “Google can sometimes use the meta description tag to create an abstract for your site, so it may be useful to you if your home page is primarily composed of graphics. However, do not expect it to increase your rank.” [10 Google Myths Revealed43]
  • .edu and .gov-sites do not provide higher PageRank (or do they?).“We don’t really have much in the way to say “Oh this is a link from the ODP, or .gov, or .edu, so give that some sort of special boost.” Its just those sites tend to have higher PageRank because-because more people link to them and reputable people link to them.” [A Google Myth Busted44]

No Follow Treatment45

  • Links marked with nofollow-attribute don’t contribute to Google PageRank. “Google implemented a new value, “nofollow”, for the rel attribute of HTML link and anchor elements, so that website builders and bloggers can make links that Google will not consider for the purposes of PageRank — they are links that no longer constitute a “vote” in the PageRank system.” [Wikipedia: PageRank6246]
  • Multiple votes to one link from the same page cost as much as a single vote. “It is reasonable to assume that a page can cast only one vote for another page, and that additional votes for the same page are not counted.” [PageRank FAQ47]
  • Links from one page to itself don’t improve Page Rank. “It is reasonable to assume that a page can’t vote for itself, and that such links are not counted.” [PageRank Explained4830]
  • Bad incoming links don’t have impact on Page Rank. “Where the links come from doesn’t matter. Sites are not penalized because of where the links come from.” [Google PageRank49]
  • Dangling links don’t have impact on Page Rank. “Dangling links are simply links that point to any page with no outgoing links. They affect the model because it is not clear where their weight should be distributed, and there are a large number of them. Because dangling links do not affect the ranking of any other page directly, we simply remove them from the system until all the PageRanks are calculated. After all the PageRanks are calculated they can be added back in without affecting things significantly.” [PageRank Paper]

1.5. Ranking Factors (related to PageRank)

  • Efficient internal onsite linking is important. “Internal linking is important to your overall ranking. Make sure your linking structure is easy for the spiders to crawl. Most suggest a simple hierarchy with links no more than three clicks away from your home/index page. Creating traffic modes or clusters of related links within a section on your site has proven very effective.” [Let Google’s Algorithm Show You The Traffic525032
  • Anchor text is important. The more specific is the reference, the better Google can evaluate it and consider it in relates search queries.
  • Google penalizes link farms. “Google is only concerned with pages of over 100 outgoing links. Google considers overly linked pages to be link farms, and they are penalized as such.” [Google FAQ51]
  • Headers (h1, … ,h6), strong tags and semantic content are important. (Update: But it doesn’t improve PageRank.) “Place it in the description and meta tags, place it in bold/strong tags, but keep your content readable and useful. Be aware of the text surrounding your keywords, search engines will become more semantic in the coming years so context is important.” [Let Google’s Algorithm Show You The Traffic525032
  • “The anchor text of a link is often far more important than whether it’s on a high PageRank page.” [What Is Google PageRank?54534017
  • “If you really want to know what are the most important, relevant pages to get links from, forget PageRank. Think search rank. Search for the words you’d like to rank for. See what pages come up tops in Google. Those are the most important and relevant pages you want to seek links from. That’s because Google is explicitly telling you that on the topic you searched for, these are the best.” [What Is Google PageRank?54534017]

2.1. Google PageRank: Theory & Scientific Background

  • A Survey of Google’s PageRank55
    Calculation of Page Rank, Page Rank Implementation, Inbound Links, Outbound Links, Number of Pages, PageRank Distribution, Additional Factors and more.
  • The Lineal Algebra Behind Google56
    The $25,000,000,000 Eigenvector – The Linear Algebra Behind Google. Google’s success derives in large part from its PageRank algorithm, which ranks the importance of webpages according to an eigenvector of a weighted link matrix. Analysis of the PageRank formula provides a wonderful applied topic for a linear algebra course.
  • The Intelligent Surfer: Probabilistic Combination of Link and Content Information in PageRank57
    We propose to improve Page-Rank by using a more intelligent surfer, one that is guided by a probabilistic model of the relevance of a page to a query. Efficient execution of our algorithm at query time is made possible by precomputing at crawl time (and thus once for all queries) the necessary terms.
  • Topic-Sensitive PageRank58
    To yield more accurate search results, we propose computing a set of PageRank vectors, biased using a set of representative topics, to capture more accurately the notion of importance with respect to a particular topic. By using these (precomputed) biased PageRank vectors to generate query-specific importance scores for pages at query time, we show that we can generate more accurate rankings than with a single, generic PageRank vector.
  • Method for node ranking in a linked database59
    A method assigns importance ranks to nodes in a linked database, such as any database of documents containing citations, the world wide web or any other hypermedia database. The rank assigned to a document is calculated from the ranks of documents citing it. In addition, the rank of a document is calculated from a constant representing the probability that a browser through the database will randomly jump to the document. By Page and Lawrence.
  • How Google Finds Your Needle in the Web’s Haystack60
    Mathematical Background of Google PageRank. By David Austin, Grand Valley State University
  • A Large-Scale Hypertextual Web Search Engine61
    Original Slides, by Larry Page.
  • Wikipedia: PageRank6246
    Mathematical Theory Behind Google PageRank

3.1. Google PageRank Tools & Services

  • PageRank Search63
    Showing search results in order of PageRank.
  • Google PageRank Inspector64.
    Google PageRank inspector is PHP scripts that can seek all of your website, include out linked page or not, and display Pagerank value for each of your website pages. New pages linked by high pagerank pages can be indexed in google quickly and have higher keyword rank in google search.
  • Google’s PageRank – Calculator65
    The results produced by the calculator indicate each page’s PageRank share and are not equivalent to the values in the Google toolbar.

PageRank Calculator66

  • Webmastereyes67, Visual PageRank View68
    The results will show the page given along with the PageRank of each link on that page. You also have the option to show “nofollow” and external links.
  • Smart PageRank69
    Checks PageRank from multiple datacenters and sends emails automatically if PageRank is updated.
  • Google PageRank Notifier70
    “This script will send you an email whenever the PageRank of the given page changes. PageRank is taken from the Google Toolbar “API” and is updated once an hour.”
  • Google PageRank™ Checker71 (registration required)
    You can monitor site’s PageRank via RSS and you can also be notified via e-mail when the PageRank has been changed.

PageRank Checker72

  • Dig PageRank73
    Checks the current Page Rank of a page in over 100 Google data centers.
  • Live PageRank Check74
    The Live PageRank value may be used as an indicator of what will show when Google decides to export the PageRank values to the Google Toolbar. The Live PageRank calculator gives you the current PageRank value in the Google index, not just the snapshot that is displayed in the toolbar. Google updates its internal PageRank value continuously as the web changes and their index is updated. Only once every third month or so this value is exported to be displayed in the Google Toolbar.
  • Page Rank Widget75 for Mac OS X.
    Llittle Widget finds the Google Page Rank for any URL by calculating the checksum and requesting the PR from Google’s servers.

PageRank Dashboard76

PageRank Decoder86

3.2. Google Tools & Services

Footnotes

  1. 1 http://www.reubenyau.com/smashing-magazine-google-pagerank-article-misleading/
  2. 2 http://www.smashingmagazine.com/wp-rss.php
  3. 3 http://www.smashingmagazine.com/2007/03/22/google-adsense-facts-faqs-and-tools/
  4. 4 http://dotpress.wordpress.com/2007/07/03/google-pagerank-que-necesitamos-conocer/
  5. 5 http://www.reubenyau.com/smashing-magazine-google-pagerank-article-misleading/
  6. 6 http://www.iprcom.com/papers/pagerank/
  7. 7 http://www.google.com/librariancenter/articles/0512_01.html
  8. 8 http://www.websitepublisher.net/blog/2006/11/17/pagerank-an-essay/
  9. 9 http://www.webworkshop.net/pagerank.html
  10. 10 http://www.smallbusinesshub.com/blog/tabid/6307/bid/45/The-Importance-of-Google-PageRank-A-Guide-For-Small-Business-Executives.aspx
  11. 11 http://www.webworkshop.net/pagerank.html
  12. 12 http://www.google.com/technology/
  13. 13 http://www.seochat.com/c/a/Google-Optimization-Help/Google-PageRank-Frequently-Asked-Questions/1/
  14. 14 http://searchengineland.com/070508-152900.php
  15. 15 http://www.einfach-persoenlich.de/2007-05-18/google-der-google-pagerank-berg-anschaulich-visualisiert.html
  16. 16 http://pr.efactory.de/e-pagerank-algorithm.shtml
  17. 17 http://searchengineland.com/070426-011828.php
  18. 18 http://livepr.raketforskning.com/
  19. 19 http://www.reubenyau.com/smashing-magazine-google-pagerank-article-misleading/
  20. 20 http://www.mattcutts.com/blog/more-info-on-pagerank/
  21. 21 http://www.sitepointforums.com/showthread.php?s=&threadid=77168
  22. 22 http://www.sitepoint.com/article/top-10-google-myths-revealed
  23. 23 http://www.smallbusinesshub.com/blog/tabid/6307/bid/45/The-Importance-of-Google-PageRank-A-Guide-For-Small-Business-Executives.aspx
  24. 24 http://www.sitepoint.com/article/top-10-google-myths-revealed
  25. 25 http://www.google.com/librariancenter/articles/0512_01.html
  26. 26 http://www.webworkshop.net/pagerank.html
  27. 27 http://www.sitepoint.com/article/democracy-corporate-muscle
  28. 28 http://www.seochat.com/c/a/Google-Optimization-Help/Google-PageRank-Frequently-Asked-Questions/2/
  29. 29 http://www.seochat.com/c/a/Google-Optimization-Help/Google-PageRank-Frequently-Asked-Questions/
  30. 30 http://www.webworkshop.net/pagerank.html
  31. 31 http://www.seochat.com/c/a/Google-Optimization-Help/Google-PageRank-Frequently-Asked-Questions/4/
  32. 32 http://www.sitepronews.com/archives/2007/apr/18.html
  33. 33 http://www.seochat.com/c/a/Google-Optimization-Help/Google-PageRank-Frequently-Asked-Questions/1/
  34. 34 http://www.sitepronews.com/archives/2006/may/22.html
  35. 35 http://www.google.com/support/webmasters/bin/answer.py?answer=35769
  36. 36 http://www.sitepoint.com/article/top-10-google-myths-revealed
  37. 37 http://www.selfseo.com/story-18694.php
  38. 38 http://www.selfseo.com/story-18694.php
  39. 39 http://www.sitepoint.com/article/democracy-corporate-muscle
  40. 40 http://searchengineland.com/070426-011828.php
  41. 41 http://searchengineland.com/070508-061206.php
  42. 42 http://www.sitepoint.com/article/top-10-google-myths-revealed/2
  43. 43 http://www.sitepoint.com/article/top-10-google-myths-revealed/2
  44. 44 http://www.websitepublisher.net/blog/2006/08/03/a-google-myth-busted/
  45. 45 http://www.searchenginejournal.com/how-google-yahoo-askcom-treat-the-no-follow-link-attribute/4801/
  46. 46 http://en.wikipedia.org/wiki/PageRank
  47. 47 http://www.webworkshop.net/pagerank.html
  48. 48 http://www.webworkshop.net/pagerank.html
  49. 49 http://www.webworkshop.net/pagerank.html
  50. 50 http://www.sitepronews.com/archives/2007/apr/18.html
  51. 51 http://www.seochat.com/c/a/Google-Optimization-Help/Google-PageRank-Frequently-Asked-Questions/3/
  52. 52 http://www.sitepronews.com/archives/2007/apr/18.html
  53. 53 http://searchengineland.com/070426-011828.php
  54. 54 http://searchengineland.com/070426-011828.php
  55. 55 http://pr.efactory.de/
  56. 56 http://www.rose-hulman.edu/~bryan/googleFinalVersionFixed.pdf
  57. 57 http://www.cs.washington.edu/homes/pedrod/papers/nips01b.pdf
  58. 58 http://dbpubs.stanford.edu:8090/pub/2002-6
  59. 59 http://www.freepatentsonline.com/6285999.html
  60. 60 http://www.ams.org/featurecolumn/archive/pagerank.html
  61. 61 http://dbpubs.stanford.edu:8091/diglib/pub/slides/berkeleydlijan98/berkeleygoogle2/
  62. 62 http://en.wikipedia.org/wiki/PageRank
  63. 63 http://www.seochat.com/?tool=7&option=com_seotools&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=&result_mode=pagerank&num=10&btnG=+++Search+++
  64. 64 http://www.rightscripts.com/pagerank/
  65. 65 http://www.webworkshop.net/pagerank_calculator.php
  66. 66 http://www.webworkshop.net/pagerank_calculator.php
  67. 67 http://www.webmastereyes.com/
  68. 68 http://www.iwebtool.com/visual_pagerank
  69. 69 http://www.smartpagerank.com/
  70. 70 http://pagerank.freddy.eu.org/
  71. 71 http://sitening.com/seo-tools/page-rank/my-checker/
  72. 72 http://sitening.com/seo-tools/page-rank/my-checker/
  73. 73 http://www.digpagerank.com
  74. 74 http://livepr.raketforskning.com/
  75. 75 http://aroussi.com/article/32/google-page-rank-widget
  76. 76 http://aroussi.com/article/32/google-page-rank-widget
  77. 77 http://www.iwebtool.com/pagerank_prediction
  78. 78 http://www.iwebtool.com/tools/
  79. 79 http://www.smartpagerank.com/pagerank-backlinks.php
  80. 80 http://seobench.com/pr-overlay/
  81. 81 http://phpmagazine.net/prmapper/
  82. 82 http://seobench.com/pr-overlay/proverlay.xpi
  83. 83 http://www.search-this.com/pagerank-decoder/
  84. 84 http://www.seroundtable.com/archives/002085.html
  85. 85 http://www.seroundtable.com/archives/002085.html
  86. 86 http://www.search-this.com/pagerank-decoder/
  87. 87 http://www.seocompany.ca/pagerank/page-rank-update-list.html
  88. 88 http://www.vaughns-1-pagers.com/internet/google-ranking-factors.htm
  89. 89 http://www.google.com/support/webmasters/bin/answer.py?answer=35769
  90. 90 https://www.google.com/webmasters/tools/siteoverview?hl=en
  91. 91 https://www.google.com/webmasters/tools/reinclusion?hl=en
  92. 92 http://dmoz.org/Computers/Internet/Searching/Search_Engines/Google/Tools/

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Vitaly Friedman loves beautiful content and doesn’t like to give in easily. Vitaly is writer, speaker, author and editor-in-chief of Smashing Magazine. He runs responsive Web design workshops, online workshops and loves solving complex performance problems in large companies. Get in touch.

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  1. 1

    Impressive

    0
  2. 2

    Great article… I’d love to print this… Can you make this available as a PDF-file or some other printer-friendly format?

    0
  3. 3

    Daniel Anderson Tiecher

    June 5, 2007 7:43 pm

    Another great article, guys! Thanks again.

    0
  4. 4

    Great article on PR, Everything explained neatly. Thanks for this wonderfull article.

    0
  5. 5

    Again a Great Article….

    0
  6. 6

    As usual, you guys rock with your informative articles

    0
  7. 7

    Phil from Loreauville

    June 5, 2007 8:44 pm

    With all the Page Rank Hype going on, it’s so nice of you to put it all together for us to see. There’s so much disinformation out there about Page Rank, what it is and what effects it.
    Thanks again, and keep up the good work!

    0
  8. 8

    Great article, thank you!

    0
  9. 9

    Awesome.

    Checked every few months eh? That makes more sense. I wonder if other google features are also checked on that basis…

    0
  10. 10

    again i must tell you guys.. thanks for the info!!!
    cheers!!! :-x

    0
  11. 11

    what does “not automatically” mean? :D

    0
  12. 12

    Wow, thats really impressive article about PageRank.
    I wonder that “semantic content are important” for PageRank, thats a new information to me.

    0
  13. 13

    Great article, I think you should clarify point 6 of the impact summary, Wikipedia links don’t improve Page Rank ( removing ‘automatically’).

    0
  14. 14

    A thoroughly good read but still leaves everything a little vague, maybe send someone undercover at google? ;-)

    My eyes hurt after reading all this.

    Any chance of someone posting this as a PDF?

    0
  15. 15

    That’s a great compilation of articles…

    0
  16. 16

    wow this kind of stuff is awesome. love smashingmag

    1
  17. 17

    Kai Spriestersbach

    June 5, 2007 10:07 pm

    Some asking again for a PDF…

    Why not implementing a @media print rule in css to support a more printer friendly output, or a automatic PDF-Generation?

    0
  18. 18

    Kai Spriestersbach

    June 5, 2007 10:09 pm

    great article – again!

    Can you give me a proof, that semantic markup (h1, p, etc.) is rated better than the same website built with layout-tables?!

    Some asking again for a PDF…
    Why not implementing a @media print rule in css to support a more printer friendly output, or a automatic PDF-Generation?

    0
  19. 19

    Vitaly Friedman & Sven Lennartz

    June 5, 2007 10:32 pm

    @Kai Spriestersbach: Search engines will definitely make more use of semantic content in the future. And the better a web-crawler can understand the content, the better search engines will be able to prioritize “better” content. Think of Microformats, for example. Tha’t the idea behind it.

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  20. 20

    Impressive list as usual :-)
    “Links from and to high quality related sites are important.”
    Today, I post list of high PR blog that offer free backlinks after make review. Is it OK to do that way to increase PR?

    0
  21. 21

    Is there a way to find out whether or not a site you’re considering linking to has been banned?

    0
  22. 22

    Vitaly Friedman & Sven Lennartz

    June 5, 2007 10:43 pm

    @Laurie: yes, it is possible. Google Banned Check.

    0
  23. 23

    Nice Write Up.

    There are many useful for me to seo my website.

    Thanks

    0
  24. 24

    I love your article! Great use of headers, illustrations and very easy to read. Definitely a bookmark

    0
  25. 25

    Great article once again. It’ll take me a while to digest it all.

    BTW Small typo in the first paragraph… “hunderds of factors”

    0
  26. 26

    Great article. Quick question. Does anyone know what is the best software optimize your site and for search engine optimization? I use Axandra IBP but I want to know if there is a better software for PC.
    Keep up a good work.

    0
  27. 27

    Very good, thanks

    0
  28. 28

    Page Rank is only half the story when it comes to Google Search.

    You should really read this.
    http://www.nytimes.com/2007/06/03/business/yourmoney/03google.html

    0
  29. 29

    Excellent article. The explanation is good and de tools useful.

    0
  30. 30

    Very well researched article… However, I think I’ll just forget about PR as I have always done – and then be pleasantly surprised when sites I make get a good PR with no effort whatsoever.

    If you game Google, you will be penalised. It’s as simple as that.

    Besides, the second that anybody actually figures out how any Google algorithm actually works – they change it. It’s happened before, and it’ll happen again!

    0
  31. 31

    Wow! You guys rock. I thank you all for such in depth info and it will help me to sharpen my blunt weapons and knowledge about page ranking. Once again thumb up.

    ADITYA.

    0
  32. 32

    Sergio Gonzalez

    June 6, 2007 2:06 am

    Another brilliant article! Bravo!

    0
  33. 33

    Daniele Simonin

    June 6, 2007 2:24 am

    Excellent article! Thanks

    0
  34. 34

    I’m reading things here everytime you get an article in delicious/popular and I must admit that this time you’ve impressed me :) Not just a collection of links but true research. Impressive article. Bookmarked.

    0
  35. 35

    Mostafa Darvishzadeh

    June 6, 2007 3:48 am

    DELICIOUS!

    0
  36. 36

    You forgot to mention that PR means VERY LITTLE in terms of Google Rankings. Anyone who tells you different is relaying FUDD.

    0
  37. 37

    Thanks this helped me a lot !!

    0
  38. 38

    Martin Voorzanger

    June 6, 2007 5:30 am

    Thanks for the great insights and hints. But, I still have a question. Why is PageRank so important after all? To me, it seems that PR is a thing of the past to Google in determining the search results. Or did I miss a point?

    0
  39. 39

    While you do a good job dispelling a few big ones, this article is still filled with myths and mistakes. PageRank is not updated every few months; it’s updated continuously along with the index, while the snapshot pushed to the toolbar servers (on that logarithmic scale you mentioned) is only updated every few months.

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  40. 40

    Linking to high quality sites is important? No, no it’s not. Especially not to PageRank calculations, where what site you’re linking to is irrelevant, only the number of links matters when you’re talking about outbound.

    Why is anchor text under “which factors do have an impact on PageRank”? Anchor text, while incredibly important to search result rankings, is absolutely irrelevant in PageRank calculations. It’s a pure numbers game. Stop talking about anything but number of links and PageRank of links, since that’s all that matters to the calculation.

    The more I reread this, the more rubbish I find.

    0
  41. 41

    Great article, love the links. Thanks

    0
  42. 42

    Vitaly Friedman & Sven Lennartz

    June 6, 2007 6:43 am

    @Dan Grossman: thank you for your input, Dan. We’ll be glad to correct the mistakes we’ve possibly done. However, it’d be nice to have sources, which justify your assumptions.

    0
  43. 43

    thanks a lot for this informations :)

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  44. 44

    Vitaly: Have you read the whitepaper that actually details the pagerank algorithm? You won’t find anything there but numbers, since that’s all this is… an enormous set of linear equations that need to be solved. The sum of all weights of all URLs must add up to 1; assigning the proper values for the 6 billion variables to make that happen is the computational challenge. Nothing but number of links weighted by number of links.

    Site age, link text, *who* is being linked to… all irrelevant. Those things are part of the search ranking algorithm as a whole, but not the PageRank calculation. If you had titled this post something other than “Google PageRank: What Do We Know About It”, you’d be able to discuss all the other ranking factors you so want to discuss.

    PageRank is a little more bland and technical for a blog like this — it’s academia.

    0
  45. 45

    Very clear explanation on Google Page Rank.

    0
  46. 46

    “Related high ranked web-sites count stronger (or don’t they?). “One-way inbound links from websites with topics that are related to your website’s topic will help you gain a higher Page Rank.” Other one-way inbound links from pages with high page rank but unrelated topics do help a little, but not nearly as much.”

    Incorrect. If you’re talking ranking then you’re right, but talking PR, that’s simply not true.

    0
  47. 47

    Dan glad to see you kicking some sense into proceedings. Although I can’t say I’m surprised that an SEO article that hits the digg frontpage is full of mistakes…

    0
  48. 48

    Very well explained! I haven’t seen more comprehensive, yet easy to understand explanation of PR. Great work!

    0
  49. 49

    Great work! Thank you very much!

    0
  50. 50

    Good!very useful!thanks a lot!

    0
  51. 51

    Excellent article, very thorough

    0
  52. 52

    Am I the only person who gets the feeling that it is “pointless” even worrying about page rank? The page rank you see in G tool bar it seems is not up to date…..adding content does not immediately result in R change and the bombshell which many figured out months ago is that

    “page rank does not guarantee ranking = traffic”

    So Why bother?

    Rob

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  53. 53

    hmm, I think PR is already not important for most of developers, who are up to fresh market news.. Pagerank should be important only for google, now we should look at alexa ratings more, and to look for better keywords ant content, but pagerank isn’t giving big important for google search results..

    0
  54. 54

    Thank you, its a very impressive article. Fantastic work! I have been looking for an article like this.

    0
  55. 55

    A really good guide to pagerank, good job!!!

    0
  56. 56

    mark rushworth

    June 6, 2007 4:46 pm

    update for you wikipedia links are all rel nofollow as of a few months back.

    0
  57. 57

    Excellent work! This article could easily worth hundreds of dollar.

    0
  58. 58

    Phill Midwinter

    June 6, 2007 5:05 pm

    Lovely collation of plagiarism that passes for an article on an attribute that’s so outdated as to be practically useless. Rather than read this stuff, go and get yourselves a professional SEO company people.

    0
  59. 59

    What to say??? As always amazing article. I would like to know if important brands have a high PageRank for being important outside internet or for doing it the right way inside internet…
    ;-)

    0
  60. 60

    This is pure :3 and >:3

    It’s not like I really cared for pagerank, but now I do!

    0
  61. 61

    Very nice post, thanks for the useful information!

    0
  62. 62

    Great article!!!

    My blog have pr 3 i try to create another website without any link on the internet only one link on my front page, some time after the blank page have pr 2….
    i already do this with 3 diferent sites and all the same one link on my blog front page during a while and the other site get pr 2….

    0
  63. 63

    Great! Is it possible to publish a german version on http://www.seo-scene.de? Or do Dr. Web this job?

    0
  64. 64

    Greate article!

    0
  65. 65

    Nice article. Gave insight to PR.

    0
  66. 66

    Kenneth Blomster

    June 6, 2007 11:31 pm

    Excellent article. Thanks for this!

    0
  67. 67

    You guys always have such detailed and interesting articles. thumbs up

    0
  68. 68

    Very informative!

    0
  69. 69

    Great article!
    I would never like to know anything more than you have given here.
    I had few doubts and now it seems this article has cleared my doubts.
    keep up the great work guys!

    0
  70. 70

    Nice, really good… Thx.

    0
  71. 71

    Mansoor Nathani

    June 7, 2007 4:34 pm

    Excellent explanation of Google Pagerank.

    Over 800 people have tagged this in del.icio.us as of June 7th only 2 days after this has been posted.

    0
  72. 72

    Thank you guys for the great article. I´m deeply impressed.

    0
  73. 73

    Good articles:)

    0
  74. 74

    Wonderful! Every article that gets published on your site is helping me improve in some or the other way. Thanks a lot for yet another useful article. Looking forward to the PDF version.
    Cheers!!

    0
  75. 75

    Excellent article! Thanks!!!

    For a long time I have been using http://www.websitegrader.com to track my website’s marketing effectiveness and it has been really useful. This article gives me additional detail on the nuances of Page Rank. Thanks.

    0
  76. 76

    Great article, never seen such explanation to pagerank.
    btw digpagerank tool checks pr in 689 datacenters not 100. :-)

    0
  77. 77

    “Links marked with nofollow-attribute don’t contribute to Google PageRank.”
    I have very strong reasons to believe this is not true. Hate to say this(I am sure spammers will go mad), but 2 years ago I had small site hosted on free hosting and free subdomain. I never did some link building for it, but I left comment on one page that got pr8 on next update and my site got pr7 from that link only. It was Worpdress comment and it had nofollow like all other WP blogs.
    So, I would say those links pass pr.

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  78. 78

    Really amazing!!! How do you guys know all these?? :D

    0
  79. 79

    Matt Ellsworth

    June 8, 2007 1:37 pm

    awesome blog post – i have learned so much about page rank here… more so than all of my other research.

    0
  80. 80

    Jermayn Parker

    June 8, 2007 1:57 pm

    dizzy with all that info. Even if we only get half of that, it will be a better world :)

    0
  81. 81

    Good extensive researched…

    0
  82. 82

    Philippe MARTY

    June 8, 2007 8:17 pm

    Great work !
    I was searching for a while all that bunch of information.

    Many thanks for this useful job !

    0
  83. 83

    Great article, especially like the pagerank mountain diagram. Is this article available as a pdf?

    0
  84. 84

    Manny Hernandez

    June 9, 2007 5:21 am

    This is the most amazing compilation of knowledge that I’ve ever encountered on the topic of PageRank. Thanks for putting it together!

    0
  85. 85

    Emanuel Felipe

    June 9, 2007 6:02 am

    Thanks for this great article…
    Can I translate it? (Smashing Magazine will recive the credits of course)

    0
  86. 86

    Wonderful resource. I thought it was too good not to be shared so I have translated it into French for us non English-speaking froggies (it means a lot of people, even in the IT world). If you have a problem with copyright or whatever, let me know I’ll remove it immediately.

    0
  87. 87

    I don’t doubt the importance of Google in general, but I have to pause to wonder if Google PageRant isn’t a little bit like Alexa ranking. That is, it seems like a self-propagating – almost viral – factor whose significance is largely predicated by the fact that bloggers & webmasters consider it to be significant.

    Or in other words, the primary factor in making those “only available for a limited time” Nascar plates (with the 24-karat gold rim) on cheesy late-night informercials “collectable” is that someone declared them to be so.

    Not bashing the Goog, just thinking out loud…

    0
  88. 88

    This blog entry contains some useful info on PR. Thanks. -Geoff

    0
  89. 89

    it doesnt say anything about changing web hosts. Does changing web hosts affect PR or google searching?

    0
  90. 90

    daryoko rispurwanto

    June 10, 2007 11:55 pm

    Very informative article, thank you..

    0
  91. 91

    Hmmm pretty interesting. I think most of us bloggers have little hope of getting a high rank ever : )

    0
  92. 92

    Inspiring and Impressive.

    0
  93. 93

    John Macpherson

    June 11, 2007 10:59 pm

    Unfortunately this article just increases the myth that PageRank is the be all and end all of SEO. Its just one factor of many. Do the top 10 sites on any search term rank with the highest PR at the top descending?… Nope.

    0
  94. 94

    hej,

    I really appreciate your work and your research seems to be well done but I am missing some links to SEO-pages in your compilation that IMHO should not be left out because of their valued content. most notably “Google Search Engine Ranking Factors” by SEOmoz.

    and when it comes to pagerank calculation or to the number of inboud links necessary to gain a certain PR I do miss some tables like the one by Bob Wakfer”.

    if I missed those articles being mentioned somewhere I apologize; i did not find them or something similar.

    0
  95. 95

    Excellent work, very detailed. Thanks. Looking forward to PDF.

    0
  96. 96

    A great article!! thank you

    0
  97. 97

    Phew .. that’s an amazing article. Good work guys.

    0
  98. 98

    Great article thanks!

    0
  99. 99

    Great explanation, thanks for the effort.

    0
  100. 100

    Lydia's assistant

    June 15, 2007 11:23 pm

    I’m not convinced everything present here is true, in fact some it seems to conflict (i.e. PR no impact on search, high PR pages tend to rank on search) but still a very powerful collection of information. Thanks for the good read!

    0
  101. 101

    You Can Do It!!!!!

    so impressive!

    thank you

    0
  102. 102

    This is cool collection about PR of Google.
    I found this interesting to read,i am happy that what i have written in karthi’s Blog is correct after reading this.

    0
  103. 103

    Duccio Giovannelli

    June 21, 2007 3:52 am

    Great article!
    It’s very interesting and there is great stuff related.
    I’ve translated it in italian on my blog rails on the road

    Thank you!

    0
  104. 104

    The best article about PR i have found, thanks!

    0
  105. 105

    Fabulous information! Came to know a lot of things abt pagerank. thanks!

    0
  106. 106

    I can’t understand the equation. What is “A” , “d” , “C” , “t1″ and “tn”???

    0
  107. 107

    Can you please tell me how much time does it take for a site to get a Google Page Rank?

    0
  108. 108

    Not a very good article at all.

    The information is mis-leading and repetitive.
    For example, we have this

    One-way inbound links from websites with topics that are related to your website’s topic will help you gain a higher Page Rank

    and then a few line down there is this

    Content is not taken into account when PageRank is calculated

    So, how does Page rank take into account topic when it doesn’t take into account content?

    It appears this article is nothing more than a mash up of various other articles written over the years of evolution of page rank.

    There isn’t even the distinction between true page rank and tool bar page rank.

    True page rank is is based on a mathematical formula this is unlikely to be the same formula cited above (Larry Page Rank) and is merely a statistical model to show the probability of a random surfer getting to your website by clicking randomly on links.

    The “page rank explained correctly with examples” link is a good site, but out of date.

    Toolbar page rank is unlikely to be linked to true page rank and is nothing more than a meaningless green bar to throw wannabe SEOs of the real trail.

    What is unacceptable in a report/article like this is to state opinion as fact. There are very few facts on this page, merely speculation. true, some of it is tried and tested, but some of the opinions here have been tried and disputed as well.

    0
  109. 109

    Wow. An amazing article. As a newbie webmaster I still have no idea what to do. Whether I should care or not. And whether I can. I hope that behind all these trees there is some forest and that I can actually see it.

    0
  110. 110

    Great Job Man, Thanks a lot for valueable information

    0
  111. 111

    Himanshu Kapoor

    July 4, 2007 9:02 pm

    This will be a useful information for my friend who is soon taking a job as SEO. He will be glad when I will forward this article to him.

    0
  112. 112

    Very well outlined. Thankfully I know all of it already or else I wouldn’t get my sites at the top of Google already ;)

    0
  113. 113

    Thanx for clearing my confusion on page rank. Great post with great details.

    0
  114. 114

    Awesome article. Thanks for the read. Now I know how to rank higher with my site. xD

    0
  115. 115

    one of the great information for webmasters

    0
  116. 116

    Amazing Read! This is a very important document. You should print a book!

    0
  117. 117

    Very interesting document! I’ll check it again! ;-)

    marco.

    0
  118. 118

    Michael Martinez

    August 7, 2007 4:21 am

    Well, it represents a lot of work but your article is pretty much a load of nonsense.

    How can you say that PageRank is based in part on relevance (it’s not) and then point out that it has nothing to do with content?

    Relevance does not equal importance.

    Importance, as measured through PageRank, has nothing to do with relevance. It’s a crude valuation system that makes no allowances for disagreements, disparagements, or faux representations.

    Relevance is determined by copy, either on-page or off-page. Relevance is quantified (scored) separate from PageRank and PageRank is used to weight or qualify the Relevance score.

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  119. 119

    Hey there great article, I always wondered what page rank was and how it worked.

    I am glad that I have book marked this page, It holds a lot of info. One would need to make return visits just to digest all the info here.

    I’m guessing the page rank goes from 0 to 10…correct me if I’m wrong….
    I see some times my page rank is 0 and then it is at 3 ….any comment on how that is or why, for the sake of a couple hours.

    currently my blog has a page rank of 3 , is that good? What can I do to make that better. Any suggestions?

    0
  120. 120

    Hi,

    I Like your article. What about database generated pages?
    I have a lot of pages generated with a script.

    Magnar

    0
  121. 121

    Seldom there is a research on Google Page rank so deep and compendious…..!!!!!

    0
  122. 122

    Great, thanks for doing all the work for us, guys, you’re great!

    0
  123. 123

    For donalyza: make sure you delete all your links from your old blog and add only one: the one to donalyza.com This will boost greatly your new site’s PR.
    Well, OK, you can add mine too as a thank you :-)

    0
  124. 124

    it’s amazing

    0
  125. 125

    This is pure :3 and >:3
    It’s not like I really cared for pagerank, but now I do!

    0
  126. 126

    Thanks for posting this great article. I’ve heard the debates about how secondary PR actually is. Now this is the clear explanation. Plus, you give alternate concepts to focus on.

    I’ve been wondering what to do with my music site and it might turn out helpful. I’ll add a bookmark because it’s wonderfully detailed.

    Thank you!

    0
  127. 127

    Great Post – thx!

    0
  128. 128

    João S. Magalhães

    September 5, 2007 6:27 am

    Dear,

    I’m a brazilian journalist, technology editor (licensed) of the site of the O Estado de São Paulo, one the most important newspapaper of the Latin American.

    I’d like to translate the sumary of this post to portuguese and publish it into my blog reporternet.jor.br . If you agree with, let me know soon.

    Thanks a lot

    0
  129. 129

    Kamaal Mustafa Sikander

    September 29, 2007 7:30 pm

    Very informative article for optimising the website to enable a clean search.

    0
  130. 130

    Aha… Really show what i want. Thanks a lot for the info. Lots of thing learned.

    0
  131. 131

    nice article, i read with great attencion, and learn great things, thnks

    0
  132. 132

    hmm.. how can i get high page rank??? got alot of page that refer to my site or got a lot domain that refer to my site that have a page rank ??

    0
  133. 133

    according to my notion my pagerank is changed every 3 months and that is what I read most of the times on the internet

    0
  134. 134

    What a wonderful article, the great and neat article on PR

    0
  135. 135

    It is the correct line, they want to say that the link from PR4 and PR5 with unique link is more beneficial than PR8 with 100 inbound links

    0
  136. 136

    Dwayne Charrington

    December 13, 2007 12:21 pm

    Fantastic post I couldn’t agree more with what you said, and I like how you went into details about Google Pagerank it was very insightful keep up the good work.

    – Dwayne Charrington
    http://www.dwaynecharrington.com

    0
  137. 137

    Great article…makes a lot of sense.

    0
  138. 138

    good stuff

    0
  139. 139

    i don’t think anybody can really explain how Google works because i have seen goolge drop a lot of sites with high page ranks for no obvious reason

    0
  140. 140

    Nice article, cleared up a few things about page rank for me. Thanks

    0
  141. 141

    Creative Solutions

    January 23, 2008 5:28 am

    I am a BIG FAN of Smashing Magazine. Thanks for such a wonderful article on Google PR. Can anyone tell me where can i find more help on calculating google PR?
    Thanks and advance.
    Cheers!

    0
  142. 142

    Relay good article.

    0
  143. 143

    Its really nice of you to put up all the details in one article :D

    I’m glad to find this place to learn more about Google’s algorithm and PR.

    Thanks for putting up efforts.

    -1
  144. 144

    superb articles!

    0
  145. 145

    Very interesting site.Very helpful.Thank you

    0
  146. 146

    lol i am the newest comment the olny 1 for 2008

    0
  147. 147

    That is a lot of things!!! I don’t ge tthe equation at all

    0
  148. 148

    Awesome post. It was very helpfull and can be perceived as a cornerstone on your website!

    0
  149. 149

    Very useful information! I think this topic needs to be further discuessed.
    Regards,

    0
  150. 150

    My last comment was for some reason tagged as spam…
    Anyway…

    @Fauzy – The script you are using to check the PR has encountered a failure. Thats why you recieve a PR -1.

    I would post a link, but it will just be marked as span once again…

    0
  151. 151

    Aurelius Tjin

    May 6, 2008 1:02 am

    This is obviously one great post. Thanks for the valuable information and insights you have so provided here. Keep it up!

    0
  152. 152

    Influence by Design

    May 6, 2008 4:09 pm

    Nice summary! I’m loving these SEO articles.

    Smashing Magazine is such an incredible resource. I look forward to reading it every day.

    0
  153. 153

    Wow the information about the Google Page rank that is provided here is awesome. And I really enjoyed the use of pictures to support the content.

    A job very well done. I must go through other posts too to get more detailed information.

    0
  154. 154

    Hi There!

    Very new to the whole seo thing and we employed a company to take care of this for us. I have noticed in my monthly report that our site has ALOT of PR 0 sites linking to it. Should I be worried? They make up around 75% of our links.

    0
  155. 155

    PageRank is a link analysis algorithm that assigns a numerical weighting to each element of a hyperlinked set of documents, such as the World Wide Web, with the purpose of “measuring” its relative importance within the set. The algorithm may be applied to any collection of entities with reciprocal quotations and references. The numerical weight that it assigns to any given element E is also called the PageRank of E and denoted by PR(E).

    0
  156. 156

    This is a really great information! Thanks for sharing.

    -1
  157. 157

    wew..i got a great information…thanks its help me to build my blog…..

    0
  158. 158

    great article, google just gave me PR2 after two months. this article really explains it. keep up the good work.

    0
  159. 159

    monster post, but awesome. Excellent work on covering all the bases, I’d even forgotten about some of these finer points, so thanks for the reminder.

    0
  160. 160

    Still don’t understand PR, hehehe.

    0
  161. 161

    Excellent article so good advice for everyone here. Not sure if I agree with the importance to linknig to external authority sites though

    0
  162. 162

    Really such a great information about Google page Rank i hope it is going to help in many ways..

    Thank

    0
  163. 163

    Jason Vandenbrink

    October 1, 2008 9:45 am

    Thanks for the great article. Well worth the read.

    0
  164. 164

    Thanx a lot for such a descriptive and informatic article…..
    I was searching for a detailed PR description for PR and now i think that my search completed…
    I m going through it and really i can say that its really really an excellent one!!!!!

    0
  165. 165

    Fantastic article. Never went thru such kinda detailed article on Page Rank. No matter how much well learned u think yourself to be, there is always something left to learn. Superb Stuff.

    0
  166. 166

    thanks a lot

    0
  167. 167

    wery nice and good post ! thanks

    0
  168. 168

    This is the most amazing compilation of knowledge that I’ve ever encountered on the topic of PageRank. Thanks for putting it together!

    0
  169. 169

    Which one show the better indicator, alexa or pagerank? Anybody can help me to decide?

    0
  170. 170

    Very rich article , full of resources & information.
    You will help a lot.
    your effort is much appreciated
    Regards

    0
  171. 171

    Nice article. Can I translate it to czech and publish it on my blog?

    0
  172. 172

    Are you idiots for real? This made about as much sense as reading the bible in Braille wearing mittens. Did any of this crap make any sense to any of you or are you pretending to understand so you wont look stupid. Well i must be stupid because I didnt understand a goddamned thing that was written about pagerank p(#$#)-^%$$=d(FG)*WEW+(pie)/a_horses_ass+d(/423)*infinite
    Come on people get real for the love of god

    0
  173. 173

    There’s some good stuff here, but I agree with Happyfeet (not as strongly as him), it’s not as easy to interpret as everyone is making it out to be. Still, a nice, useful explanation of PR, despite some confusing portions (particularly in the equations).

    And as for Carmen,

    I don’t want to sound like I’m spamming or anything, but a really good tool to use to figure out what problems your site could have is http://spydermate.com

    I believe they’re going through some changes right now in getting the final version up (it’s still in its Beta stage), because it looks different than it used to, but it still offers some good content about what’s wrong with your site.

    Do a quick scan… looks like you have a ton of broken links, for starters…

    0
  174. 174

    Really a very good and detailed article about PR.. Thanks a lot

    0
  175. 175

    Google PR..

    So HOT

    0
  176. 176

    A very informative article. I got a clear vision of PR.

    0
  177. 177

    I think this is a good bit of info on PageRank, I like it and it has helped me on my site.

    I really do apreciate the time you put into writing these articles. They do take a long time to read, but they do help, so thanks.

    Keep up the good work
    Christopher

    0
  178. 178

    Cool stuff, great post.

    0
  179. 179

    very wonderfull article, thank you

    0
  180. 180

    A really comprehensive article – but im not sure im anymore enlightened than i was before. Im trying to boost my page rank as an uninformed amatuer, maybe i should enlist the services of a SEO co. Anyone have any good ones they can recommend???

    0
  181. 181

    nice sharing thank you job

    0
  182. 182

    really good writ-up!

    0
  183. 183

    Very informative article and contents are well organized.
    As mentioned in the article ,PagRank does not rank the website as a whole.So it is doubtful that Page Rank can be a useful factor for estimating the reliability of an information on the internet.However,PageRank is a great and significant contribution to Search Engines.

    0
  184. 184

    Learn seo and learning to bring it to the blog traffik need perseverance, this may be, many questions: how do

    How To Increase Traffic Blog / website, if you are a blogger or a website owner, you definitely want more traffic to your blog or website is. You may often seek out information on the internet about how I Increase Traffic To Your Blog / Website you. On this article I will spell out
    3 How to Increase Traffik blog / your website. List is different from the others because the simple, original and unique ideas. If you want to search for people to see the website / blog you,

    2 How to Increase Traffic Blog / website I believe this can work well for the site / your blog. Here are 2 ways are:

    1. Write contain more. If you want traffic, you must write contain. People do not akan charcoal-site you visit if you do not contain the good writing, interesting & quality, and new visitors will not return to your blog. So keep posting the interesting writing.
    2. Design & layout is good. If your site design disorganized, difficult to navigate, or the color does not match the vision (glare), also full atao error, visitors certainly will not stand for long berlama-diblog you.

    0
  185. 185

    “Google PageRank is probably one of the most important algorithms ever developed for the Web”
    there are many other algorithms that are more important than PageRank itself. too much importance on PR like this actually promote link farming, swap linking and others. PageRank is supposed to be a vote for site based on its popularity and should be treated like that. artificial linking shouldn’t be counted as PageRank at all.

    0
  186. 186

    Will you be posting an update to this excellent post? Google has made some significant changes since 2007…

    0
  187. 187

    Raymund @ Pinoy Social Network

    July 19, 2009 1:12 am

    This is as complete as it can get. An update will be very much appreciated. This is one of the best articles I’ve read with regards to Page Rank.

    0
  188. 188

    Saptarshi Durgavanshi

    July 30, 2009 9:55 am

    I m very much intrested in SEO tools developements.I really liked this stuff

    0
  189. 189

    Mauricio Mueller

    August 14, 2009 9:08 am

    Very good article, thnks for it! I was calculating using the equation that calculates a page’s PageRank and seems that is missing a number, the one that makes Page Rank level progressively harder to reach. What do you think about it?

    0
  190. 190

    this is the single greatest piece of consolidated info on the sacred algorithm i have ever read…..and its free. bloody brilliant!!!!!

    0
  191. 191

    I always like to say that SEO is not an exact science, but after reading this post I am thinking twice about that statement. I know no one can make a site magically appear at the top of the Google PageRank system, but these are some fantastic tips that will definitely help you there.

    Thanks,
    Carson

    0
  192. 192

    Absolutely amazing and lengthy article, almost all of which I believe is still relevant today. This should be referenced everywhere for the newbies that think that PR is everything, when really there are many other factors that determine search engine rankings.

    Aaron

    0
  193. 193

    waw.., n waw.. excellent

    0
  194. 194

    Thank you so much for the information. You changed my knowledge because I used to think that high page rank means high results listing in Google search.
    I also learnt a lot from this post! Thanks for your wonderful content!

    Nguyen Hanh

    0
  195. 195

    Really its very useful for me.. Thanks

    0
  196. 196

    I’m very agree that “High Page Rank doesn’t mean high search ranking.”

    so let’s more focus about how to get “top 10″ in every search engine..

    0
  197. 197

    Hi everyone,
    I am very glad to meet everyone. I am agree with Pulsa. Example i have a site conhantaovietnam.com pagerank of it 1, and site1vn.com/ pagerank of it 3. But when i search google, result of it at page 13 or 14.
    So i am agree with Pulsa.

    Thanks.

    0
  198. 198

    Hi,
    nice Article and i got more info for this article and everybody visit my site and comments for my Article.www.adnpost.com

    0
  199. 199

    How frequently google updates the PR?
    http://www.globinch.com/

    0
  200. 200

    I have learn a lot from here. Thanks

    0
  201. 201

    I like this so much I have added this link on my blog

    Also you should mention about the pagerank crawler tools like the one on checkpagerank.in

    1
  202. 202

    Where’s the PDF version of this? I don’t see a link to it anywhere.

    -1
  203. 203

    No doubt, each inbound link is too important for getting Google page rank. But I have question, How can we check or verify someone website is banned or black listed or not?

    0
  204. 204

    The Open Directory Project [DMOZ.org] has a great power of time to set the pagerank, beyond being “.Org” is the official directory of Google.
    I’ve noticed this on my website csndicas.com enhancement of Dmoz and other sites with same extension

    A hug. Cristiano Santos

    0
  205. 205

    But Cristiano of csndicas.com in the case of DMOZ does not accept simply do not register the Site or Blog, is worth trying again enter into another category? or the second request will be denied?

    0
  206. 206

    Nice article. Very informative.

    0
  207. 207

    Thanks for providing the great information….

    0
  208. 208

    Nice article. Very informative. Wow. An amazing article. As a newbie webmaster I still have no idea what to do.

    0
  209. 209

    That was one hell of an article! Many thanks for sharing that with us and helping me understand what pagerank is!

    0
  210. 210

    complete info about page rank loving it :)

    thanks for gr8 post mate

    thanks & regards

    1
  211. 211

    There’s some good stuff here, but I agree with Happyfeet (not as strongly as him), it’s not as easy to interpret as everyone is making it out to be. Still, a nice, useful explanation of PR, despite some confusing portions (particularly in the equations).
    My recent web: barcosbarcelona.com

    0
  212. 212

    This is the most comprehensive explanation and long long term discussion on Google page rank. The posts are highly useful and informative. I think age of a website has something to do with Google Page Rank. Read also dunwebhost.comto learn more about Google PR. Thanks.

    0
  213. 213

    Excellent article! Thanks….it helped me a lot…

    0
  214. 214

    Thank u for the comprehensive explanation

    1
  215. 215

    This is the most comprehensive and rare explanation on Google page rank. Here is a highly useful information. Thanks for sharing such a nice article.

    1
  216. 216

    Thanks for the wonderful article very useful and very well explained.

    0
  217. 217

    It is really a nice article, will definitely help to my site earnchat.com to earn pagerank.

    0
  218. 218

    Hi,

    Excellent article about google page rank,It is very useful for every SEO .thanks a lot…..

    1) Thank u for posting this.

    2) Thanks to google for indexing this page.

    0
  219. 219

    Thank you brother, it’s incredible articles

    1
  220. 220

    Yes this is good articles i impress with this articles.

    0
  221. 221

    Does anyone have any good site for backlinking to help with Google PR? Trying to get The Million Dollar Website Ranked! Globich, good article, thanks for the post!
    themilliondollarwebsite.org

    0
  222. 222

    Amazing article its blew my mind the feedback and transaction is amazing believe the points coming across the point will equal the answer to the article amazing!

    0
  223. 223

    It was fun to read this article:) Thanks, very interesting.

    0
  224. 224

    Nice content…. Very valuable information

    0
  225. 225

    This was a very helpful article. I am interning at the internet marketing database biznextdoor.com and now hopefully I won’t sound too out of place.

    0
  226. 226

    great article :)

    0
  227. 227

    Hi there,
    beside of some contraddictions – eg: when you say PR is not about content, but then quote a line saying that “Google examines all aspects of the page’s content (and the content of the pages linking to it) to determine if it’s a good match for user’s queries.” (??) …what i’m really curious about is to know wether pr affects or not advertising placement on open-ranking contexts.. ok let me try again : )..

    google adwords allows you to bid for one or multiple keywords, but after the auction it’s actually some sort of quality score (meaning also “the quality of the landing page”) that’ll speed you up and down the range you’ve been paying for (eg: 1-3)… well what I’d love to find out is if PR is one of this enhancing “quality score” values, or if not, what can make the difference in this kind of advertising environment.

    Hope this is not going OT.

    ..and thanks for the huge mash up! :D

    1
  228. 228

    Nice to know. Thanks.

    0
  229. 229

    The general assumption has been that it is the PageRank of the URL that matters. This cannot be the case because many webpages with PR 0 can be found on the top results page of Google for highly competitive keywords.

    The majority of these occurrences prove to be for URLs where the HomePage PR is relatively high.

    There are still many occasions, however, when HomePages with PageRank 0 are in top positions for middle difficulty keywords. Google is clearly assuming that each HomePage is the most authorative for that website and Google is all about authority. If you add a boost to the effective PageRank of HomePages when they are competing for a keyword to a maximum PR of 5 it all begins to make sense.

    Google is more interested in the authority of the website, as indicated by HomePage PageRank, than the PR of the individual pages on a website. This explains why webpages, even those with low PageRank, on websites such as Wikipedia, the BBC and CNN tend to be at the top of Google results pages – they have HomePage PageRanks of 8 and 9.

    It seems to me that the #1 factor in the Google algorithm is the HomePage PageRank. The #2 factor is the boost given to the PR of HomePages competing for a keyword. The averaged adjusted HomePage PageRank of the top 10 pages for a keyword (HPR-KD) is the best indicator available to us of keyword difficulty.

    Guidelines are available to indicate the minimum HomePage PageRank for a website to have any chance of reaching top page positioning on Google. The HomePage of a website has the best chance for that website to achieve top page positioning on Google for the preferred keyword.

    I hope this is of interest.

    0
    • 230

      Hi,

      This is what I believe.

      I don’t think there is something called “Homepage PageRank”. What you say about low PR pages from high PR sites can easily be explained using facts known today.

      PageRank is updated constantly by Google, the PageRank visible for us isn’t. These 0 PR pages are simply boosted by internal links.

      0
  230. 231

    It’s a finest article ever.

    0
  231. 232

    Hi,

    Great job! I just have one objection. I see no real evidence that link relevancy would affect PageRank.

    The first source says nothing about how link relevancy affects PageRank, only Google rankings.

    The second source sounds plausible, but it does not say that this applies.

    “It’s thought that Google may be implementing a system of Topic Sensitive PageRank, designed to pass along varying percentages of available PageRank based on theme relevance. The more closely related the pages, the higher the PageRank amount transferred.”

    Link relevancy shouldn’t affect PR, if you stick to the following formula.

    PR(A) = (1 – d) + d * SUM ((PR(I->A)/C(I))

    Where:

    PR(A) is the PageRank of your page A.
    d is the damping factor, usually set to 0,85.
    PR(I->A) is the PageRank of page I containing a link to page A.
    C(I) is the number of links off page I.
    PR(I->A)/C(I) is a PR-value page A receives from page I.
    SUM (PR(I->A)/C(I)) is the sum of all PR-values page A receives from pages with links to page A.

    I’m not saying this to be rude, I’m saying this because I am interested. I have been trying to find the connection between link-relevancy and PageRank for more than a while now.

    0
  232. 233

    I’m impressed, I need to say. Really not often do I encounter a phorum that’s each educative and entertaining, and let me inform you, you have got hit the nail on the head. Your concept is outstanding; the difficulty is one thing that not sufficient people are speaking intelligently about. I’m very blissful that I stumbled throughout this in my seek for something regarding this.

    0
  233. 234

    I will right away clutch your rss feed as I can’t to find your email subscription hyperlink or newsletter service. Do you’ve any? Please allow me recognize in order that I may just subscribe. Thanks.

    0
  234. 235

    would you look at that, this article is almost over 5 years old, but still gaining traction… way to go smashingmag! http://j.mp/exPresso

    0
  235. 236

    Its crazy how much things have changed in regards to page rank since this post.

    -1

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