|Link popularity is a measure of the quantity
and quality of other web sites that link to a specific site
on the World Wide Web. It is an example of the move by search
engines towards off-the-page-criteria to determine quality content.
In theory, off-the-page-criteria adds the aspect of impartiality
to search engine rankings.
Link popularity plays an important role in the visibility
of a web site among the top of the search results. Indeed,
some search engines require at least one or more links coming
to a web site, otherwise they will drop it from their index.
Search engines such as Google use a special link analysis
system to rank web pages. Citations from other WWW authors
help to define a site's reputation. The philosophy of link
popularity is that important sites will attract many links.
Content-poor sites will have difficulty attracting any links.
Link popularity assumes that not all incoming links are equal,
as an inbound link from a major directory carries more weight
than an inbound link from an obscure personal home page. In
other words, the quality of incoming links counts more than
sheer numbers of them.