The document discusses the origins and key concepts of Web 2.0. It was coined at a conference in 2004 to refer to second generation web development focusing on communication, sharing, and collaboration. Web 2.0 led to social networking sites, video sharing, wikis, blogs, and folksonomies (collaborative tagging). Key attributes include harnessing collective intelligence, data sharing, and user-centered design. Examples provided are Google Apps, Dropbox, Wikis, and social networking sites.