Web 2.0 refers to second generation of the World Wide Web that focuses on user-generated content, usability and interoperability for users to interact and collaborate. It involves a movement from static web pages to dynamic and shareable content through social media and networking. Web 2.0 is defined by how people use the internet, not changes in internet technology. Examples of Web 2.0 tools that support collaboration include blogs, wikis, social bookmarking/tagging, YouTube, Facebook and Twitter. Both benefits and challenges of adopting Web 2.0 tools in education are discussed.