Web 1.0 never left. It's just a term that refers to cyberspace before 2002. People mark the shift from Web 1.0 to 2.0 with the dramatic collapse of Web-based companies whose phenomenal growth was based on the profit potential of a new customer: the Internet user. Generally, Web 1.0 sites have a commercial focus. On the other hand, Web 2.0 reverses the top-down, management-centric model of Web 1.0. Web 2.0 is a bottom-up operation in which the user community drives content creation. This article presents a user-friendly introduction to Web 2.0.