yearn.finance is a decentralized ecosystem of aggregators that utilize lending services such as Aave, Compound, Dydx, and Fulcrum to optimize your token lending. When you deposit your tokens to yearn.finance, they are converted to yTokens, which are periodically rebalanced to choose the most profitable lending service(s). Curve.fi is a prominent integrator of yTokens - creating an AMM (Automated Market Maker) between yDAI, yUSDC, yUSDT, yTUSD that not only earns the lending fees but also the trading fees on Curve.fi.
YFI, yearn.finance's governance token, is distributed only to users who provide liquidity with certain yTokens. With no pre-mine, pre-sale, or allocation to the team, YFI strives to be the most decentralized token. Although most of the ecosystem was built by Andre Cronje, control of YFI was transferred to a multi-signature wallet, which requires 6 out of 9 participants to agree on changes.
As a truly decentralized protocol, any changes to the yearn.finance ecosystem are always done via on-chain proposals and voting.
How to use Yearn Finance?
Navigate to [yearn.finance, https://yearn.finance/] and deposit DAI, USDC, USDT, TUSD, and/or, sUSD and start earning interest.