The best definition of Link Popularity could read as follows: “Popularity of website calculated on the number of links that the site receives from other sites on the World Wide Web.” The more links that the site receives, the greater his “popularity”. Of course, not all links have the same value or the same weight. Receiving a link from a site already known and therefore people will have a higher weight than a link received, for example, from a personal website. Moreover, if the site link that has the same theme of the receiving site, this link will weigh even more. The link popularity is now a significant factor for many search engines (including Google).
