Euler (EUL) is a digital token for the Euler platform, a decentralized finance (DeFi) protocol built on Ethereum. It allows users to lend and borrow various digital assets, with features like permissionless lending and efficient risk management. EUL tokens are used for governance, enabling holders to vote on platform decisions, and may be used in reward structures. The platform was founded by Michael Bentley, Doug Hoyte, and Jack Prior in 2021.