Web 2.0 is a new concept in internet use that focuses on user participation, collaboration, and sharing through interactive and dynamic websites. Some key aspects of Web 2.0 include user-generated content, the ability to share content through social media and bookmarking sites, and utilizing new technologies that allow users to participate online through activities like video sharing, chatting, and using social networks. Web 2.0 represents a shift from static websites to more dynamic sites that are focused on the user experience and user involvement.