Glossary
Proof of Stake
Proof of Stake (PoS) is a method blockchains use to agree on their shared record, where participants lock up the network's own cryptocurrency as collateral for the right to validate transactions and add new blocks. Instead of racing to solve puzzles, validators are chosen to propose blocks based partly on the stake they commit.
The close-up. Every public blockchain needs a way for strangers to agree on one shared history without a central referee — this is consensus. In Proof of Stake, participants called validators lock up, or "stake," a quantity of the network's native token as a bond. The protocol then selects validators to propose and confirm new blocks, weighting the odds toward those with more at stake. Honest work is rewarded; provably dishonest behavior can trigger slashing, where part of the staked collateral is destroyed. This ties economic skin-in-the-game directly to good behavior.
The wide shot. Proof of Stake emerged as an alternative to Proof of Work, the puzzle-solving approach that secures some older networks. Its central appeal is that security comes from committed capital rather than from continuously running energy-intensive hardware, which is why PoS chains are often described as more energy-efficient.
Designs vary widely. Some networks let holders delegate their stake to professional validators, and staking arrangements differ in lock-up terms and risk. Critics note that influence can concentrate among large stakeholders, a trade-off each protocol handles differently. Understanding these mechanics helps you read how a given chain is secured — but it is not investment guidance. Always do your own research.