SushiSwap is a decentralized exchange (DEX) built on the Ethereum blockchain that allows users to trade cryptocurrencies directly without intermediaries. It operates using an automated market maker (AMM) model, where users provide liquidity by depositing tokens into pools and earn rewards in return. Launched in 2020, SushiSwap originated as a fork of Uniswap, another popular DEX. It offers various features, including yield farming, staking, and governance through its native token, SUSHI. This enables users to participate in decision-making processes regarding the platform's future developments.