PageRank是一种在搜索引擎中根据网页之间相互的链接关系计算网页排名的技术。 PageRank是Google用来标识网页的等级或重要性的一种方法。其级别从1到10级，PR值越高说明该网页越受欢迎（越重要）。PageRank近似于一个用户在Internet上随机地单击链接将会到达特定网页的可能性。通常，能够从更多地方到达的网页更为重要，因此具有更高的PageRank。(PageRank is a technology that calculates page ranking in a search engine based on links between pages. PageRank is a way Google identifies the rank or importance of a web page. Its level from 1 to 10, the higher the PR value, indicating that the web is more popular (the more important). PageRank approximates the likelihood that a user will click a link randomly on Internet to reach a particular web page. In general, pages that can be reached from more places are more important, and therefore have higher PageRank.)