It's a little more complex than counting links. Before Google, most search engines only examined the keywords on a given page to determine relevence. Google i

It's a little more complex than counting links. Before Google, most search engines only examined the keywords on a given page to determine relevence. Google improved on this by ranking results according to the "PageRank", which is a probability distribution that represents the likelihood that a person randomly clicking on links will arrive at any particular page. With few exceptions, PageRank doesn't really capture any semantics associated with the links.