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The source of Google success is page ranking system called after Larry Page, Google PageRank™. It is a mathematical algorithm calculating the importance of a website according to many onsite and offsite factors.

Basically, a website that has more inbound links will be higher in search engine results page (SERP) than the same website with less sites linking to it. It is an idea taken from the science world, where the importance of publication is measured through the number of quoting in periodics. Placing a link to some website Google treats as some kind of vote for this site and gives it some significance. But weight and quality of a website also counts. It is known that a government website is more important than a personal home webpage. It is like that because government have power and right to publicize official announcements, changes to law, new tax systems and so on. Our home page can only refer and link to the above information’s.

That’s why a link from a site with bigger credibility and higher meaning weights more than couple or even some tens of links from an unknown pages with little or no importance. Logically it appears to use this system to prioritize sites on internet.

Google sorts websites according to 10 scale system, where 0 is site with no importance and 10 is a well known, credible website with many visitors and high traffic (very few websites have PageRank™ of 10).
Image:PageRank-byFML.gif

Picture 1.
A humoristic picture showing how PageRank™ system works. From Wikipedia, the free encyclopedia.
Google, by adding some new features to its algorithms gives higher importance to websites that are loner on the internet. In natural way these sites should possess some number of inbound links from other websites and some constant number of visitors. That’s why new websites get higher link weights than old sites to close the gap between them. New sites have no or very few inbound links and Google tries to make it equal to everyone by doing that. New sites can much easier get high listings in search engine results and high PageRank™ in the early phases of their existence. With time they usually lose their high positions and only then it is possible to determine what weight does the website really have.

It is not a good idea to buy a lot of links from a high PageRank™ websites to newly created web pages. Google assumes that such pages don’t have reach and developed content like sites that exist longer. It is common mistake while web optimization process. If link from a newly published website from a new web domain is added to numerous web directories and websites with high PageRank™ it is possible that such site will land in sandbox. Do not mistake sandbox with ban – a removal from indexes. Sandbox means lowered website PageRank™ and lower position in SERP, but is not equal to removal from indexing. Such site might still appear in SERP, but will lose its high positions for some or all keywords. The site will continuously be visited by Google web crawlers so don’t worry. After a while (from several weeks to several months) it will leave sandbox and be restored on full rights to search engine indexes.

However the trademark rights to PageRank™ system has Google Inc., the patent rights belong to Stanford University, where Larry Page and Sergey Brin, the founders of Google studied.

Google itself describes PageRank™ as:

“PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page’s value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at considerably more than the sheer volume of votes, or links a page receives; for example, 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.” Using these and other factors, Google provides its views on pages’ relative importance.”

If you want to read more about how Google PageRank™ algorithm works visit http://en.wikipedia.org/wiki/PageRank where waits for you great article about technology that PageRank™ relies and was built on.

Full Google explanation of its ranking system can be viewed under this address:
http://www.google.com/technology/

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