Blueberry is a decentralized lending protocol on Ethereum, offering up to 20x leveraged borrowing and lending. It utilizes Position NFTs to manage leverage strategies and ensure protocol safety, governed by the Blueberry DAO. The platform supports various strategies like leverage trading and yield farming, enhancing capital efficiency for users. Roles within the protocol include lenders, strategists (borrowers), and liquidators, each contributing to the ecosystem's stability and growth.