What is Decentralized Exchange (DEX)?
A DEX lets you trade crypto without giving custody of your coins to a company.
Unlike centralized exchanges (like Coinbase or Binance), a DEX has no sign-up forms, passwords, or ID verification.
Trades execute directly on the blockchain using liquidity pools.
Why It Matters in Web3 & Crypto
You keep 100% control of your private keys. If a DEX website goes down, your funds remain safe in your own wallet.
Key Mechanics & Best Practices
- 1Connect your Web3 wallet (such as MetaMask or Phantom) to the official DEX website.
- 2Select the token pair you want to swap (e.g., ETH to USDC).
- 3Check slippage settings and network gas fees before confirming the swap.
Practical Scenario
To swap 1 ETH for 3,000 USDC on Uniswap, you connect your wallet, click Swap, and approve the transaction. The smart contract swaps the tokens directly inside your wallet in 15 seconds.
SECURITY & RISK TIP
Always bookmark the official DEX URL to avoid fake lookalike websites designed by scammers to drain wallets.