Staking is the process of locking up or delegating cryptocurrency to help a proof-of-stake (PoS) blockchain validate transactions and produce new blocks. In exchange for putting capital at risk on the network's behalf, stakers earn a share of newly issued tokens and, on some chains, a cut of transaction fees.
The mechanism replaces the energy-intensive mining used by proof-of-work chains like Bitcoin. Instead of competing with computing power, validators are chosen to propose blocks roughly in proportion to how much stake they (and the people who delegate to them) control. Because validators have capital locked up, the protocol can penalize dishonest or unreliable behavior by 'slashing' a portion of that stake — this economic threat is what keeps the network honest.
For most holders, staking does not mean running a validator yourself. Instead you delegate your tokens to an existing validator, who does the technical work and shares the resulting rewards with you, typically after taking a commission. This is the model used by exchange staking, staking-as-a-service providers, and most wallet-integrated staking flows.
Rewards are usually quoted as an annual percentage yield (APY), but that number moves with network conditions: total amount staked, protocol issuance schedules, and — for some assets — transaction fee volume. A higher APY is not automatically 'better'; it often reflects a newer or smaller network with more inflation and more risk.