Uniswap (UNI) is a decentralized exchange protocol that allows users to trade cryptocurrencies directly from their wallets without the need for a centralized intermediary. It utilizes an automated market maker system to facilitate trades and provide liquidity for various digital assets. UNI token holders have governance rights in the platform, enabling them to vote on proposals and changes to the protocol. Uniswap has gained popularity for its user-friendly interface and ability to provide access to a wide range of tokens in a decentralized manner.