网页PageRank is a link analysis algorithm and it assigns a numerical weighting to each element of a hyperlinked set of documents, such as the World Wide Web, with the purpose of "measuring" its relative importance within the set.
网页PageRank (PR) is one of the algorithms by Google that determines the relative importance of a page within the World Wide Web. It does so by looking at the quantity and quality of other pages linking to it and then assigning a value to it based on those backlinks.