Web3
Web3 is the idea of an internet where users own their data and assets through blockchains and crypto wallets, instead of keeping everything on big companies' servers.
How it works
Web1 (the 1990s) was a read-only internet of static sites. Web2 is the internet of social networks and platforms: you create the content, but companies own the data, accounts and rules. Web3 adds ownership: money, tokens, NFTs and even voting rights are recorded on a blockchain at your address and cannot simply be taken or blocked. The term was popularized by Ethereum co-founder Gavin Wood in 2014.
In Web3 you connect a wallet instead of entering a login and password. Apps (dApps) run on smart contracts: DeFi exchanges, NFT marketplaces, DAOs, games. Your assets are not held by the app; it only asks you to sign transactions.
Web3 has downsides too. Mistakes cannot be undone, support often does not exist, and one wrong signature can give a scammer access to your tokens. Many projects call themselves Web3 for marketing while staying centralized underneath.
You open a decentralized exchange: instead of signing up, you click "Connect wallet", pick a pair and sign a swap of 100 USDC for ETH. Your funds stay at your address the whole time, and the app only gets permission for that specific swap.
The main mistake is signing everything your wallet shows without reading it. In Web3 a signature is an action with money: it can let a contract spend your tokens with no limit. Use a separate wallet for new sites, check the site's address and regularly revoke permissions you no longer need.
Questions and answers
What is Web3 in simple terms?
It is an internet where you own your money, tokens and digital items through a crypto wallet, not through an account at a company.
How is Web3 different from Web2?
In Web2, platforms own the data and accounts. In Web3, assets are recorded on a blockchain at your address and you log in with a wallet.
Is Web3 safe?
The technology can be solid, but all the responsibility is yours: a lost key or a signature on a phishing site means losing funds with no way back.
Related terms
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Updated: 2026-10-19