The document discusses the evolution of the web from Web 1.0 to Web 2.0. Web 1.0 featured one-way communication through portals, while Web 2.0 enables two-way interaction and participation through user-generated content, social networking, information sharing, and reuse of web applications and data. Core technologies powering Web 2.0 include APIs, web services, RSS, Ajax, and open web standards. The document also provides examples of popular Web 2.0 applications and speculates on emerging technologies that may come next.