A popular search engine developed by Google Inc. of Mountain View, Calif. uses PageRank.RTM. as a page-quality metric for efficiently guiding the processes of web crawling, index selection, and web page ranking. Generally, the PageRank technique computes and assigns a PageRank score to each web page it encounters on the web, wherein the PageRank score serves as a measure of the relative quality of a given web page with respect to other web pages. PageRank generally ensures that important and high-quality web pages receive high PageRank scores, which enables a search engine to efficiently rank the search results based on their associated PageRank scores.
A continuation patent of an updated PageRank was granted today. The original patent was filed in 2006, and reminded me a lot of Yahoo’s Trustrank (which is cited by the patent’s applicants as one of a large number of documents that this new version of the patent is based upon.)