What is Proof-of-Work (PoW)?

Proof-of-Work (PoW) is one of the consensus mechanisms employed in the blockchain. PoW allows adding new blocks to the blockchain and verifying transactions once a complex mathematical puzzle has been solved.

The network can approve a block only when a miner successfully completes PoW behind each block that they mined. Then the miner receives a reward for solving the PoW puzzle.

For example, when it comes to PoW in Bitcoin, miners must also generate a hash that matches Bitcoin’s current target which usually has more zeroes in the front. The probability of creating such a hash is low, but the miner that is able to do it first receives BTC.

Additionally, PoW makes sure a single transaction doesn’t use the same coin or token, thus avoiding double-spending. 

Besides that, PoW adds a layer of security to the blockchain since meddling with any single block immediately requires changes to be made within other blocks.

It’s important to remember that cryptocurrencies are decentralized, unlike fiat currencies that are confined by regulations. In the crypto sphere, PoW helps blockchains to remain decentralized by removing the involvement of third parties like the government.