Web 2.0 involves.. Internet-based tools that allow the user to make, take, share, create, exchange, document, record, edit, push information, and receive information are everywhere. These Web 2.0 tools afford many opportunities for rich and enduring learning through orality, visualization, co-constructed knowledge, and self-organized knowledge. Read more here.

Web 2.0 is .. second generation of web development and design, that aims to facilitate communication, secure information sharing, interoperability, and collaboration on the World Wide Web. Web 2.0 concepts have led to the development and evolution of web-based communities, hosted services, and applications; such as social-networking sites, video-sharing sites, wikis, blogs, and folksonomies. (reference)