What is the role of a cryptocurrency miner?

A cryptocurrency miner is a participant in a blockchain network who verifies and processes transactions by solving complex cryptographic puzzles. Miners use specialized hardware to perform computational work, and once they successfully solve a puzzle, they are allowed to add a new block to the blockchain. In return for their efforts, miners are rewarded with newly minted cryptocurrency tokens (such as Bitcoin or Ether) and transaction fees. Miners play a vital role in maintaining the integrity and security of the blockchain by ensuring that transactions are valid and that the network operates smoothly.