What Is Proof-of-Stake and How Does It Differ from Proof-of-Work?

Proof-of-Work (PoW) requires miners to expend significant computational power to solve complex mathematical problems to validate transactions and create new blocks. Proof-of-Stake (PoS) requires validators to stake or lock up their own cryptocurrency as collateral to be chosen to validate blocks.

PoS is generally considered more energy-efficient and scalable than PoW. PoS achieves consensus based on ownership stake rather than computational work.

Can a Centralized Entity Influence Consensus in a PoS System?
What Are the Primary Security Trade-Offs between PoW and PoS?
How Does Proof-of-Stake (PoS) Differ from PoW in Terms of Security and Energy Use?
What Are the Primary Differences between Proof of Work (PoW) and Proof of Stake (PoS) Consensus Mechanisms?
How Does the Shift from PoW to PoS Affect the Issuance Rate of a Cryptocurrency?
How Does the Energy Consumption of Proof-of-Work Compare to Proof-of-Stake Consensus Mechanisms?
How Does Proof-of-Stake (PoS) Aim to Reduce Energy Consumption Compared to PoW?
How Does PoW Differ Fundamentally from Proof-of-Stake (PoS)?