Web3 is a comprehensive idea that includes blockchain technology and new Web-based exchange structures. With decentralization, digital ownership, digital markets, and tokens, Web3 will offer security and anonymity. But what is Web3 in reality? What does blockchain have to do with it, and how does it impact data security and privacy in the modern internet era? In this lecture, entrepreneurs Mark Mitchell and John Mitchell from Stanford University provide us with an inside look at recent advancements in the blockchain-based web.