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What is Proof of Stake (POS)? Proof of Stake (POS) is a consensus mechanism used in blockchain to ensure that transactions are validated and new blocks are added to the chain. Unlike the earlier Proof of Work (POW) mechanism, POS does not require validators to perform intensive computational work. Instead, the probability of validating transactions and creating new blocks depends on the amount of cryptocurrency the validator holds (referred to as their "stake").
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