Web3 is the idea of an internet where users hold their own assets, accounts and data through blockchains, instead of relying on platforms to hold them. Ethereum co-founder Gavin Wood introduced the term in 2014. Today it is a loose label for the applications and infrastructure built on public blockchains. The ethereum.org introduction to Web3 sums it up as read, write, own.
It is a direction, not a finished product. Much of what gets called Web3 still depends on ordinary companies and servers.
How the Internet Got Here
- Web1 (roughly 1990 to 2004): mostly static pages. Users read content that a small number of publishers wrote.
- Web2 (roughly 2004 to today): social networks, video sites and marketplaces where users create the content. The platform owns the accounts, the data and the rules.
- Web3: users hold assets and identity in wallets they control, and applications run on shared networks that no single company owns.
These labels are informal. Web2 platforms are not going away, and most Web3 apps are reached through ordinary websites.
Core Ideas
- Ownership: tokens and other assets sit in a wallet controlled by a private key, not in a company's database.
- Open access: anyone with a wallet can use an application or build on it without asking permission.
- Verification over trust: transactions are checked by a network of computers following public rules, so users do not have to trust one intermediary.
- Native payments: value moves in the same system as the application, with no card processor in between.
- Token incentives: networks reward the people who run, fund and use them with tokens.
Each of these has a cost. Ownership means nobody can reset your password. Open access means scams can launch as easily as honest projects.
Web3 in Practice
- DeFi: lending, trading and saving through smart contracts. It offers alternatives to some banking services but has not replaced banks.
- Stablecoins: tokens that track a currency such as the US dollar. They are among the most widely used Web3 products.
- NFTs: unique tokens used for art, collectibles, tickets and game items.
- DAOs: organizations where token holders vote on a shared treasury and on protocol rules. Uniswap and Aave are governed this way.
- Social: protocols such as Farcaster and Lens, where your account and followers are not tied to one app.
- Storage: networks such as IPFS, Filecoin and Arweave, which store files across many computers.
- Identity: readable names such as those from ENS, which map a name to a wallet address.
The Infrastructure Underneath
- Ethereum and layer 2 networks: where most smart contracts run and settle. Other chains such as Solana serve the same role.
- Oracles: services such as Chainlink that bring outside data, like prices, onto a blockchain.
- Indexers: services such as The Graph that organize blockchain data so apps can query it.
- Wallets: software or hardware that holds your keys and signs transactions. The wallet is your login.
How Web3 Projects Make Money
Web2 companies mostly earn from advertising and subscriptions. Web3 protocols usually charge fees on activity, such as a share of each trade or loan, and many issue a token.
Early users are sometimes given tokens, which can turn them into owners as well as customers. This can align users and builders. It can also attract people who only want the reward and leave once it ends. Token prices are volatile, and many tokens give holders no claim on the protocol's revenue.
Limitations and Criticism
- Usability: wallets, recovery phrases and network fees are hard for newcomers. One mistake can mean a permanent loss.
- Security: smart contract bugs, bridge hacks and phishing have cost users billions of dollars.
- Hidden centralization: many apps depend on a few infrastructure providers, hosted websites and teams with upgrade keys. Decentralized is often a matter of degree.
- Speculation: a large share of activity is trading, not everyday use.
- Regulation: rules for tokens, stablecoins and DeFi differ by country and keep changing.
- Scale: public blockchains handle far fewer transactions than large Web2 systems, though layer 2 networks have narrowed the gap and reduced fees.
Work is under way on several of these. Account abstraction on Ethereum lets wallets behave like smart contracts, which allows features such as social recovery, spending limits and apps paying fees for their users.
Staying Safe
- Never share a recovery phrase. No legitimate app or support agent needs it.
- Read what you sign. A token approval can give a contract permission to move your funds.
- Bookmark the sites you use. Fake copies of popular apps appear in ads and search results.
- Start with small amounts until you understand how an application works.
- Treat unexpected tokens in your wallet with suspicion. Interacting with them can be a trap.
Common Misunderstandings
- Web3 is not a new internet that replaces the old one. It is a set of protocols running on the existing internet.
- Data on a public blockchain is not private. Transactions are visible to everyone.
- A token is not a share in a company unless legal documents say so.
- Decentralized does not mean safe. It means there is no central party to reverse a mistake.
Nothing in this article is financial advice.
Key Web3 Facts
- Term introduced: 2014, by Gavin Wood
- Core building blocks: blockchains, smart contracts, wallets and tokens
- Main uses today: DeFi, stablecoins, NFTs and DAOs
- Main obstacles: usability, security and unclear regulation
Track on CoinMarketGuy
Tokens behind Web3 infrastructure have live pages with price, market cap, supply and chart, for example Ethereum and Chainlink. The trending page shows which coins are being searched for most, and the homepage shows total market cap and the Fear and Greed reading.