There isnt one definition of what Web3 is .... but its commonly referred to as the opposite of web2 (centralized companies such as Google,FB etc...) which indicate Web3 is DECENTRALISED

None of the crypto projects are decentralized, its just a marketing play.......

I'm not repeating anything I heard from anyone, I verified that myself

https://podcasts.apple.com/nl/podcast/muteness11-from-behind-the-curtain-of-a/id1497540130?i=1000583136159