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Google Page Rank Explained

Posted on Feb 24, 2008 by Paul White

The Original Equation that Google used when formulating the pagerank system is widely available on the internet.  However its assumed that google has modified this equation, and they don't publish the exact equation anymore.

PR(A) = (1-d) + d(PR(t1)/C(t1) + ... + PR(tn)/C(tn))

I don't want to go into a full technical explanation of this equation, its a simple equation, but my goal is to help the average man understand the system.  The first would be to use celebrities and their relationships to their fans.  The Idea is the more people that know who you are the higher you sit on pagerank.  The Example below demonstrates this.

Google idealy wants to mimic the natural way in which we determine what is hot and what is not.  In the above example you will see that Paris Hilton is the most popular.  Not because she has any worth, but because everyone knows who she is.  The Fans have the least value because noone knows who they are.  Each arrow represents a link.  The 5 Fans all have links on their sites going to Paris's Site.  but Paris doesn't return the links back to them.  In real life there would be millions of links pointing at Paris Hilton.  And in real life to get this kind of status on the web would also require millions of links. 

Even though trading links is very worth while.  Its important to understand that when you give a link to someone that has no status, it drains some of your page rank, than to give a link to someone that has lots of status.  For this reason you want to be careful when trading links with new sites.  They will benefit from your link, but you won't benefit from theirs, unless they grow very quickly.  Its best to wait and see how a site grows, before exchaning links with them. 

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