Link popularity is a term that refers to how many other links point towards a particular website. The term link popularity also has two different forms, Internal and External, which refer to the links coming from the websites own web pages and from other websites. Internal link popularity means the number of links to the website from web pages that belong to the particular website. External link popularity is the number of links from outside sources that lead back to the particular website. In the end, websites with high link popularity have what is called link cardinality or link superiority and have a reputation for being informative, as well as ranking highly on search engines. Link popularity is also an approach that many search engines take when deciding where to rank websites.