What is link popularity?

Question

I don't know about link popularity, what is this..

Answer 1

Link popularity refers to the number of web pages on the Internet which are recognized by a search engine to have a hyperlink reference to your site, or in other words are "pointing" to your web site as a reference.

Answer 2

The theory goes something like this: The search engine Powers That Be have decided that if other sites are linking to your site, it must be a winner; therefore, it deserves a boost in rankings (when all else is equal). If you think about it, this makes a lot of sense. People link to good sites, not bad ones.