Web 2.0 refers to the second generation of the World Wide Web that is focused on user-generated content and thin client computing. User-generated content allows everyone to publish their own opinions, audio, video, blogs, and wikis on the internet. Thin client computing stores data and applications on web servers, allowing people to access their information from any computer. However, some disadvantages of Web 2.0 include the potential for inappropriate, false, or copyrighted information without proper fact-checking of user uploads. The document expresses the opinion that Web 2.0 may do more harm than good due to unreliable information and lack of copyright protection for content creators.