So what exactly is PageRank and how does it affect your rankings in the search engines? This article will set you straight on this often misunderstood topic.
PageRank is essentially the measure of a web page's importance relative to all other web pages. While no one knows the exact algorithm Google uses to calculate PageRank, one of the major factors is the number and quality of inbound links pointing to the page in question.
The key to understanding Google PageRank is to realize the democratic nature of inbound links. A link to your page from some external site is really a vote or "thumbs up" for that page. The more votes (i.e., inbound links) a page gets, the more important the page must be.
While your Meta tags and main page keyword help determine the relevance of your page, PageRank determines the importance of that page. When Google returns search results, it wants to return a page with the highest relevance AND the highest importance.