This document defines Web 2.0 as a trend in World Wide Web technology that aims to facilitate creativity, collaboration, and sharing among users. It discusses how Web 2.0 sites allow users to do more than just retrieve information by featuring rich, user-friendly interfaces that empower DIY web use. Examples provided of Web 2.0 sites include eBay, Wikipedia, Bebo. The document also examines social networking sites like Bebo and MySpace, outlining advantages such as easy account setup and event organization, but also potential disadvantages like identity fraud, bullying, and privacy issues that can arise from unwanted access to user profiles.