The document discusses various aspects of Web 2.0 including what it is, popular websites that exemplify it, and ways it can be used in education. Web 2.0 is characterized as a read-write web that relies on user participation and the sharing of information through things like user-generated content and social media. Examples are given of widely used Web 2.0 sites like YouTube, Facebook, and Wikipedia as well as ways teachers can incorporate tools like blogs, podcasts, and wikis into their classrooms.