This link popularity tool enables you to determine how many websites are linking to yours by querying the leading search engines (Google, Yahoo, MSN, Ask). A site's link popularity is important as this is one of the factors search engines use to determine Page Rank and rankings. By following on a regular basis your site's link popularity and your competition's site popularity you can adjust your market strategy by increasing links which will result in a higher rankings (PR) in the search engine results.