Link Popularity

See page popularity.

The number of links pointing at a website. For competitive search queries link quality counts much more than link quantity. Google typically shows a smaller sample of known linkage data than the other engines do, even though Google still counts many of the links they do not show when you do a link: search.

When other web sites link to your site, your site will rank better in certain search engines. The more web pages that link to you, the better your link popularity.