View source

<seo title="Google Page Rank" metakeywords="Google,seo,page rank,Google PR,top page in google" metadescription="Google Page Rank" /><div align=justify>PageRank was developed at Stanford University by Google's co-founders Larry Page (this is where the name 'Page-Rank' comes from) and Sergey Brin as part of a search engine research project. They had the idea of "link popularity" order of the information on the search engine: more links to a page meant higher aranking. The first paper describing PageRank and the initial prototype of the Google search engine was published in 1998. Then Page and Brin founded Google Inc.

PageRank has been influenced by several works such as citation analysis (developed in the 1950s by Eugene Garfield) and by Hyper Search (developed by Massimo Marchiori). Page and Brin cite Garfield and Marchiori in their original paper.

PageRank is considered to be one of the most important factors to determine the ranking of Google search results, however there are a lot of other factors to be considered here.

* '''PageRank algorithm'''

Let's take an example. There are four web pages: A, B, C and D. The initial PageRank is evenly divided between them, i.e. the PageRank of each page is 0.25.

If pages B, C, and D have links only to A, they would each bring 0.25 PageRank to A. As all links point to A, it will gather all PageRank PR( ):

    PR(A)= PR(B) + PR(C) + PR(D)

This makes 0.75.

Suppose that page B has a link to pages C and A, while page D has links to all other three pages. In this case page B gives 0.125 PR to page A and 0.125 PR  to page C. Only one third of D's PageRank goes to A's PageRank (about 0.083).

    PR(A)= PR(B)/2+ PR(C)/1+ PR(D)/3

In short, the PageRank from an outbound link is calculated by the page's own PageRank score divided by the number of outbound links L( ). '''Note:''' in this example links to specific URLs are counted only once per document).

    PR(A)= PR(B)/L(B)+ PR(C)/L(C)+ PR(D)/L(D) 

* '''False PageRank'''

Though now PageRank is being calculated thoroughly, it was easily manipulated at one time. A drawback of this value was that any page with low PageRank that was redirected (with 302 redirect) to a high PageRank page caused the lower PageRank page to obtain its PageRank, i.e. PR 0 page with no incoming links being redirected to the page with PR 10 would get PR10. This spoofing technique is known as 302 Google Jacking. It was possible to spoof any page's PageRank and only Google has access to the real PageRank. </div>
Return to Google Page Rank.
Retrieved from "http://myidealhost.com/tutorials/Google_Page_Rank"
Navigation

Search
