Web3, also known as the decentralized web, is a vision for the future of the internet in which users have more control over their data and online experiences. Here's a simple explanation you can use to explain web3 to your mother.
Think of the Internet as a giant library. In a traditional library, all the books are stored in one place and you have to go to the library to see them. Likewise, on the current internet, all data and information is stored on central servers, and you have to go through a central authority (like Google or Facebook) to access it.