yearn.finance (YFI) is a popular decentralized finance (DeFi) platform that offers users the ability to optimize their yield farming strategies by automatically moving their funds between different protocols to maximize returns. It is a part of the Yearn Ecosystem and is compatible with various other ecosystems such as Avalanche, Polygon, Near Protocol, Gnosis Chain, Fantom, Harmony, Arbitrum, Ethereum, Optimism, Base, Index Coop Defi Index, Alameda Research Portfolio, Energi, Sora, Huobi ECO Chain, Blockchain Capital Portfolio, and Index Coop Index. It is not an endorsement or recommendation for investment.