Web3 is the name some technologists have given to the idea of a new kind of internet service that is built using decentralized blockchains — the shared ledger systems used by cryptocurrencies like Bitcoin and Ether.
If the mention of words like web3, crypto, and their complementary acronyms—NFT, DAO, DeFi, et cetera—prompt fears or jeers, derision or confusion, I shall serve as Virgil to your Dante.