In plain English
What Proof of stake means
In proof of stake, the network relies on validators who commit coins as collateral. The protocol uses that stake, along with randomized or weighted selection rules, to decide who helps confirm the next block. If a validator misbehaves or goes offline, it can miss rewards and, in some systems, lose part of its stake.
Why it matters
Proof of stake affects who can participate in securing a chain, how block production is assigned, and how economic penalties work. It is a different risk model from proof of work: stake can be slashed, but that does not remove all network, software, or custody risk.
Example
Simplified example: a chain requires 32 units of its native coin to run a validator. Alice deposits 32 coins, her validator is chosen to attest to blocks, and she earns rewards for correct participation. If she signs conflicting messages, the protocol may penalize her stake.
Quick answers
Common questions
Is proof of stake the same as staking?+
No. Staking is the act of locking coins or tokens into a protocol; proof of stake is the consensus system that uses that stake to secure block production.
Does proof of stake eliminate mining?+
On proof-of-stake networks, block validation is not based on mining hardware. But other chains may still use proof of work.
Sources