What are cryptocurrency mining pools?

Cryptocurrency mining pools are groups of miners who combine their computing power in order to increase their chances of mining blocks, and therefore reward. Pools allow miners to receive a portion of the reward for solving a block, with each participant receiving a reward according to how much work they contributed. Mining pools provide miners with access to resources they may not have had access to or the money to purchase their own hardware, as well as providing a more steady and reliable income.