Proof-of-Work (PoW) is a consensus mechanism used in various blockchain networks to validate transactions and secure the network. It requires participants, known as miners, to solve complex mathematical problems. This process consumes computational power and energy.When a miner successfully solves a problem, they create a new block of transactions and add it to the blockchain. In return for their effort, the miner receives a reward, usually in the form of newly created coins and transaction fees.The main purpose of PoW is to prevent attacks on the network, such as double-spending. Since solving the problem requires significant resources, it becomes impractical for malicious actors to overwhelm the network by producing blocks faster than honest miners.While PoW has proven effective for securing networks like Bitcoin, it has been criticized for its environmental impact due to high energy consumption. This has led to the exploration of alternative consensus mechanisms that aim to achieve similar security goals with lower energy usage.