The document discusses the evolution of the web from Web 1.0 to Web 2.0. It defines Web 2.0 based on O'Reilly's definition as a business revolution caused by the move to the internet as a platform. It outlines some key differences between Web 1.0 and 2.0 technologies, including static vs. dynamic/user-generated content. The document also lists several common design patterns of Web 2.0 sites like collaborative tagging, synchronized web, and social networking that emphasize participation and sharing over proprietary platforms.