Computerworld - https://www.computerworld.com/article/3269686/blockchain/proof-of-stake-could-overtake-proof-of-work-to-govern-blockchain-cryptocurrencies.html#tk.rss_all
Blockchain distributed ledgers work by linking together a chain of electronic records, each inextricably tied to the one before it; each new set of entries or “blocks” is completed and time-stamped with a hashtag only after passing through a consensus process.
The two most popular mechanisms or protocols for authenticating new entries on a blockchain and governing changes to the networks are Proof of Work (PoW) and Proof of Stake (PoS).
[ Further reading: Bitcoin mining leads to an unexpected GPU gold rush ]
As the name suggests, PoS consensus models enable those with the most digital coins (the greatest stake) to govern