Yearn.finance (YFI) is a decentralized finance (DeFi) protocol that aims to simplify and optimize yield farming. It is a platform that allows users to automatically find and invest in the highest-yielding opportunities in DeFi, without having to manually navigate multiple platforms and protocols.

Yearn.finance (YFI) was created by Andre Cronje, a South African software developer, and entrepreneur, in July 2020.

Yearn.finance (YFI) is primarily used as a yield aggregator and optimizer for DeFi investors. The platform automates the process of finding and investing in the highest-yielding opportunities in DeFi, such as lending, liquidity provision, and automated market maker (AMM) pools. By doing so, it aims to maximize returns and reduce risks for users. Additionally, YFI token holders have the ability to participate in the governance of the protocol and make decisions on proposed changes or upgrades.