Google Page Rank

Every search engine has its own search preferences and therefore, results of the search queries fluctuate with every search. However, a search engine friendly website is the one that becomes visible quickly on the top pages for specific keywords or key phrases. There is no doubt that a large amount of search traffic relies and comes from Google. However, other search engines like bing and yahoo still have their own space and respect. Unlike Google, Yahoo is the content producer and a search engine as well. Therefore it is also essential to have yahoo optimization for your website.

Google PR Algorithm


If pages B, C, and D each only link to A, they would each confer 0.25 PageRank to A. All PageRank PR( ) in this simplistic system would thus gather to A because all links would be pointing to A.

PR(A)= PR(B) + PR(C) + PR(D).\,

This is 0.75.

Suppose that page B has a link to page C as well as to page A, while page D has links to all three pages. The value of the link-votes is divided among all the outbound links on a page. Thus, page B gives a vote worth 0.125 to page A and a vote worth 0.125 to page C. Only one third of D's PageRank is counted for A's PageRank (approximately 0.083).

PR(A)= \frac{PR(B)}{2}+ \frac{PR(C)}{1}+ \frac{PR(D)}{3}.\,

In other words, the PageRank conferred by an outbound link is equal to the document's own PageRank score divided by the normalized number of outbound links L( ) (it is assumed that links to specific URLs only count once per document).

PR(A)= \frac{PR(B)}{L(B)}+ \frac{PR(C)}{L(C)}+ \frac{PR(D)}{L(D)}. \,

In the general case, the PageRank value for any page u can be expressed as:

,

i.e. the PageRank value for a page u is dependent on the PageRank values for each page v out of the set Bu (this set contains all pages linking to page u), divided by the number L(v) of links from page v.

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