Google ranking

Giganews Newsgroups
Subject: Google ranking
Posted by:  fer
Date: Thu, 9 Mar 2006


how google and yahoo decide which link is most popular than others. and when
somebody tries a search how they decide the ranking of the related links and
moves them up ?..
does they store the hits of the all pages ?.. how they know the hts of the
pages ?..

and how the ranking could risen programatically ?..(what the ranking
sofwares do ?..)