Aero is a unified liquidity layer and cross-chain decentralized exchange built for the Ethereum ecosystem. It enables users to swap tokens across connected chains while automatically routing trades through efficient liquidity. Users can provide liquidity for rewards or stake AERO to coordinate liquidity allocation and receive a share of exchange revenue. Aero also provides infrastructure for token issuers to launch and bootstrap liquid markets. The protocol unifies the Aerodrome and Velodrome ecosystems and supports chains including Ethereum, Base, Optimism, and Arbitrum.