What is flow Web3?

Could you please explain what flow Web3 actually is? I've been hearing about it quite frequently in the cryptocurrency circles, but I'm still a bit hazy on the specifics. Is it a new blockchain technology? Or is it more of a framework or platform? Also, how does it differ from other blockchains that are currently in use? I'm curious to know its potential applications and whether it's suitable for enterprises or just for individuals. Lastly, could you give me a brief overview of its architecture and key features? Thank you for clarifying this for me.