Yearn was first to build upon the concept of yield farming by creating a suite of yield-optimizing DeFi protocols to maximize available yield through automation.
The Yearn platform faces greater attack vectors due to the composability of DeFi (if one protocol fails, the entire pool fails) and is not very user friendly given confusing naming conventions for yield-bearing tokens..
Yearn is a one-stop shop for you to set-and-forget your crypto assets by providing the highest yields across many popular DeFi pools via its vault automation strategies.