A page with a higher PageRank is deemed more important and is more likely to be listed above a page with a lower PageRank. Google describes PageRank: PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page’s value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Official Google Blog.