Lido Staked SOL (STSOL) is a liquid staking token that represents staked SOL tokens on the Solana blockchain. It allows users to stake their SOL tokens and receive staking rewards while retaining the ability to trade or transfer their staked assets. Lido Staked SOL provides a convenient way for users to participate in staking without locking up their assets, making it a popular choice for investors looking to earn passive income in the Solana ecosystem.