Staking locks tokens to help secure a proof-of-stake network or protocol in exchange for rewards.
Native staking can have unbonding periods. Liquid staking issues a receipt token you can still use in DeFi.
In research workflows, Staking is usually interpreted with Proof of stake, Liquid staking, APR, and Validator rather than as a standalone signal. Smart-contract, oracle, and governance risks are part of the product. Yield without understanding the mechanism is usually underpriced risk.