what is Web 3.0? Why is this needed?

Web 3.0 is a new stage in the development of the Internet, which will most likely use blockchain technologies and other decentralization tools like DAO. It is also worth noting that Web 3.0 https://hacken.io/researches-and-investigations/web-3-0-transformation-explained-cybersecurity-implications/  goes far beyond the Internet and fully penetrates the real world. This is an attempt to change the financial system and the principles of interaction between people, form new rules for companies and build a completely new world.