What problems will Web3 solve?

As an individual with a keen interest in the evolving landscape of technology and finance, I'm curious to understand the potential of Web3 and its role in addressing some of the challenges we currently face. Could you elaborate on the specific problems that Web3 aims to solve? Are these issues related to security, scalability, interoperability, or perhaps other aspects of the current web architecture? Additionally, how does Web3's decentralized and user-centric approach differ from previous iterations of the web, and how might these differences contribute to solving these problems?