This document discusses Web 2.0 and related technologies. It defines Web 2.0 as a set of philosophies and practices that provide users with a rich online experience through user-generated content and web-based communities. It provides examples of popular Web 2.0 tools and applications like social networking sites, wikis, blogs, and podcasts. It also lists objectives of Web 2.0 such as knowledge sharing, collaboration, and expanding access to the internet through various devices.