Understanding Link Popularity

What exactly is link popularity? It is not Page Rank. Link popularity is the measure of how popular your page is and how many links are directed to your site; and the quality of the sites that are directed to your site. Page Rank, on the other hand, is almost always confused with link popularity. Page Rank is normally a Google term, ranging from 1-10, and is used to classify the relevancy of a site based on keywords, description, and link popularity. Link popularity uses quality; page ranking uses quantity.