Lido is an AI tool that provides decentralized staking services for Ethereum 2.0, allowing users to stake their ETH tokens without needing to run their own nodes. Key features include the ability to stake any amount of ETH, earn staking rewards, and contribute to the security and operation of the Ethereum network. Additionally, Lido provides users with stETH tokens in return for their staked ETH, which can be used within the Ethereum DeFi ecosystem.