Distributed consensus: PoW vs PoS

Proof-of-work (PoW) and proof-of-stake (PoS) are the two main types of consensus algorithms used by most blockchain-based cryptocurrency platforms to verify transactions. Digital currency transactions are broadcasted on a blockchain network, which usually consists of a large number of computing machines and an immutable distributed ledger.
Competing To Validate Blocks, Verify Transactions
The distributed ledger is referred to as a blockchain, and it contains a permanent record of all transaction