When you delegate your SOL to a Stake Pool, you get JSOL tokens in return. These tokens are your proof of a share ownership in the stake pool, and they can be traded back for SOL at the end of any epoch.
Obviously, you get more SOL than you staked in the first place, including your APY accrued over the staking period.
Obviously, you get more SOL than you staked in the first place, including your APY accrued over the staking period.