Lido (LDO) is a decentralized finance protocol that aims to bring liquidity to staked digital assets, specifically Ethereum 2.0. Ethereum 2.0 is a major upgrade to the Ethereum network that introduces staking, allowing users to lock their ETH as collateral and earn rewards. Lido enables users to deposit ETH and receive a tokenized representation of their staked ETH (stETH). LDO is used for governing the protocol, allowing token holders to influence the decision-making process.