Re:PG's essays, ranked "Google-style"
by pclark on Thursday December 16, 2010 @11:06AM
(#2012452)
What does "Google-style" mean? How are these numbers calculated and what do they mean?
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He said he used PageRank algorithm
http://en.wikipedia.org/wiki/PageRank
It is what google ranking is said ot be based upon. though they keep their exact algorithm secret afaik.
In a nutshell, you give each page a base score, and have it give away part of its score to the pages it links to. Assuming that the page author wouldn't link to a page with poor/irrelevant content, you get some sort of quality/popularity score for each page.