Google Page Rank (PR) is a registered trademark and patented by Google on January 9, 1999 which protects a family of algorithms used to assign a numerical relevance of the documents (or web pages) indexed by a search engine. Its properties are discussed by experts in search engine optimization. The Page Rank system is used by the popular Google search engine to help you determine the importance or relevance of a page. It was developed by the founders of Google, Larry Page and Sergey Brin at Stanford University.
The Formula: PR (A) = (1 – d) + d (PR (T1) / C (T1) + … + PR (Tn) / C (Tn)
- PR(A) is the PageRank of page A,
- PR(Ti) is the PageRank of pages Ti which link to page A,
- C(Ti) is the number of outbound links on page Ti and
- d is a damping factor which can be set between 0 and 1.
Google has become the far most utilized search engine worldwide. High-quality sites receive a higher Page Rank, which Google remembers each time it conducts a search. Of course, important pages mean nothing to you if they don’t match your query. Google combines Page Rank with sophisticated text-matching techniques to find pages that are both important and relevant to your search. Google goes far beyond the number of times a term appears on a page and examines all aspects of the page’s content (as well as the content of the pages linking to it) to determine if it’s a good match for your query.
Page Rank is not simply based upon the total number of inbound links. The basic approach of Page Rank is that a document is in fact considered the more important the more other documents link to it, but those inbound links do not count equally.
The Google Page Rank relies on the democratic nature of the web by using its vast link structure as an indicator of the value of a specific page. Google interprets a link in a page A to page B as a vote, by page A, for page B. But Google looks beyond the volume of votes or links a page receives and also analyzes the page that casts the vote. Votes cast by pages considered “important” worth more and help to make other pages “important”.
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