Uniswap is the largest decentralized exchange (or DEX)

Uniswap is the largest decentralized exchange (or DEX) operating on the Ethereum blockchain. It allows users anywhere in the world to trade crypto without an intermediary. By supplying tokens to Uniswap liquidity pools, users can earn rewards while enabling peer-to-peer trading. Anyone, anywhere, can supply tokens to liquidity pools, trade tokens, or even create and list their own tokens.