What is content farm
 

What is Content Farm?

Please explain.

In the context of the World Wide Web, the term content farm is used to describe a company that employs large numbers of often freelance writers to generate large amounts of textual content which is specifically designed to satisfy algorithms for maximal retrieval by automated search engines. Their main goal is to generate advertising revenue through attracting reader page views as first exposed in the context of social spam.

http://en.wikipedia.org/wiki/Content_farm

Are Article directories as Ezine, Goarticles, hubpages and squidoo treated as content farms?

Please guide.