A DeFi aggregator is a platform that consolidates decentralized finance services, allowing users to access multiple protocols and platforms in one place. These aggregators optimize yield farming, staking, and liquidity provision by finding the best rates and opportunities across various DeFi platforms. By using a DeFi aggregator, users can streamline their DeFi participation, maximizing returns while reducing transaction costs and complexities. These platforms simplify the user experience, making decentralized finance more accessible and efficient for everyone in the ecosystem.