This document discusses Web 2.0 and its applications for language teaching. It begins by outlining some key characteristics of Web 2.0, including its emphasis on user participation and user-generated content. It then provides examples of popular Web 2.0 applications like YouTube, Wikipedia, and blogs. The document also addresses both benefits and challenges of using Web 2.0 in education, such as increased engagement but also safety and time concerns. It concludes by listing several specific Web 2.0 tools that can be used for language teaching purposes.