Google’s algorithm uses a patented system called PageRank to help rank web pages that match a given search string. The PageRank algorithm computes a recursive score for web pages, based on the weighted sum of the PageRanks of the pages linking to them. The PageRank derives from human-generated links, and correlates well with human concepts of importance.{mospagebreak}

The exact percentage of the total of web pages that Google indexes are
not known, as it is very hard to actually calculate it. Previous
keyword-based methods of ranking search results, used by many search
engines that were once more popular than Google, would rank pages by
how often the search terms occurred in the page, or how strongly
associated the search terms were within each resulting page. In
addition to PageRank, Google also uses other secret criteria for
determining the ranking of pages on result lists, reported to be a
number over 150.

Posted in: English Content