Web 3.0 will subvert the Web 2.0 Internet from three perspectives: openness, privacy, and co-construction, and create a decentralized world dominated by user communities, reconstructing the paradigm of Internet traffic value. Openness, privacy, and co-construction, Web 3.0 is transforming and restructuring the Internet we know from three directions, that is, Web 2.0 centered on core Internet companies. However, as Web3.0 is increasingly mentioned in the industry, what is Web3.0? What are the characteristics of Web3.0? Why do we need Web3.0? These doubts are becoming the three dark clouds troubling contemporary Internet users. Next, we will try to help everyone dispel