Proof-of-stake (PoS) is a system in which a network (e.g., a cryptocurrency blockchain) aims to achieve distributed consensus.
Proof of stake
https://en.wikipedia.org/wiki/Proof_of_stake
Web
What is "proof of work" or "proof of stake"?
https://www.coinbase.com/ru/learn/crypto-basics/what-is-proof-of-work-or-proof-of-stake
What Is Proof of Stake (PoS) in Crypto?
Lyle Daly
https://www.fool.com/investing/stock-market/market-sectors/financials/cryptocurrency-stocks/proof-of-stake/#:~:text=Proof%20of%20stake%20is%20a,add%20them%20to%20the%20blockchain.
September 24, 2021
Why Proof of Stake is Flawed with Lane Rettig
December 20, 2021
https://www.youtube.com/watch?v=trwhWsKm3Qs