The main difference between Web2 and Web3 is the level of control and ownership users have over their data. In Web2, which is the current internet, users rely on big tech companies to store and manage their data, which can lead to issues with privacy and censorship. Web3, on the other hand, is all about decentralization, where data is stored on a network of computers rather than a single server, giving users more control over their personal info and online interactions. For everyday users, this shift could mean more autonomy and security online, but it's still a developing concept and it's hard to say exactly what it will look like in practice.