In the world of cryptocurrency, miners are like bookkeepers for a giant, digital record book. This record book is called a blockchain, and it keeps track of all the transactions happening with a particular cryptocurrency. Miners use powerful computers to solve complex puzzles, and the first one to solve the puzzle gets to add a new page (called a block) to the record book. As a reward for their work, miners are sometimes given new cryptocurrency coins. Miners can be anyone from individuals with a computer at home to big companies with lots of computing power.
