Uniswap (UNI) is a decentralized cryptocurrency and Ethereum-based platform that functions as an automated market maker (AMM). It allows users to exchange ERC-20 tokens directly through smart contracts without the need for intermediaries. Uniswap provides liquidity using liquidity pools where users can deposit their assets and earn commissions on trades. The UNI token is used to govern the platform, allowing holders to vote on changes and improvements to the protocol. Since its launch, Uniswap has become one of the largest and most popular decentralized exchanges.