What is web 2.0? Information from http://www.webopedia.com/TERM/W/Web_2_point_0.html
Web 2.0 was the generation of the world wide web following web 1.0. With web 2.0, users were now able to interact with each other. As oppose to the static HTML pages from web 1.0, web 2.0 pages were more dynamic, organized, and based on serving web applications to users.