Google Page Rank is a number between one and ten which is assigned to websites indexed by Google. Google PageRank is Google’s way of assessing the relative quality of a Web site or Web page on the Internet.PageRank is a numeric value that represents how important a page is on the web. Google figures that when one page links to another page, it is effectively casting a vote for the other page.
PageRank is Google's way of deciding a page's importance. It matters because it is one of the factors that determines a page's ranking in the search results. It isn't the only factor that Google uses to rank pages, but it is an important one. My Google PageRank allows Webmasters to view their site's PageRank online. In addition, Webmasters can use the provided code from the My Google Page Rank tool to display their site's PageRank to their visitors.