Yearn is a DeFi platform that offers a variety of yield farming strategies. The annual percentage rate (APR) of each strategy is determined by the market conditions and the underlying assets. As such, the APR of each strategy can be quite variable, and it is not always the case that Yearn offers the highest APR. However, Yearn has consistently provided competitive APRs, and their strategies have proven to be among the most profitable in the DeFi space.