Google Search: PageRank Algorithm


Ever wonder how the well known Google search engine works? Here is small description. Google search engine algorithm also know as PageRank algorithm makes heavy democratic use of internet's link structure. So it calculates value (priority) (Page Rank) of each page on web as follows. 

Page Rank of any page is calculated with a simple formula which adds not only matches(relevance) to your search keyword but also no of pages who has links to it. So if page A is has link to page B, then page B has vote for it from page A. It also analyzes pages A (that has link), so pages A which are important (have high Page Rank) are thus improves Page Rank of page B they have link to.


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.

Well, no one can buy a higher Page Rank from Google.

Read More about PageRank at this links and improve their Page Ranks ;-)




Original Paper


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