The term “Web 2.0” was used in late 2004 by O’Reilly Media’s Dale Dougherty.
He stated that the Web was becoming filled with new types of applications and websites, which was the beginning of a new second phase of architecture and development for the World Wide Web.
This term was made popular by Tim O’Reilly in establishing the first Web 2.0 Conference (http://www.web2summit.com/web2010).