In a nutshell, web2 and web3 are two different stages of internet development. Web2 is the modern internet where data and content are controlled by centralized companies like Facebook and Google. Web3, on the other hand, is a decentralized internet based on blockchain and cryptocurrencies. One of the key differences between web2 and web3 is data management. In web2, your data and personal information is stored on centralized company servers and they have full control over that information. In web3, data is stored on a blockchain and you have more control over your information. I recently read an article on https://romtos.com/articles/web2-vs-web3 that goes into detail about the difference between web3 and web2. It contains a lot of useful information and examples. I think it will help you understand this topic better.