Yearn.Finance is a collection of Ethereum-based protocols that allow users to maximize their returns on crypto assets by using lending and trading services. It's a decentralized finance (DeFi) aggregator service that uses automation to help investors increase yield farming earnings.Yearn.Finance is powered by a decentralized community that is working together to produce an ever-expanding array of financial products on Ethereum and reaping the benefits.To stay in a decentralized manner, the protocol is governed by YFI holders and maintained by various independent developers. Each YFI token represents a controlling share in the development of Yearn's smart contract system.