A Bitcoin mining pool is a group of Bitcoin miners who work together to increase their chances of finding a block. When a block is found, the reward is shared among all the miners in the pool.
For example, let’s say a pool has four miners. When a block is found, the reward is divided among the four miners in the pool. The miners will then receive a portion of the reward based on the amount of hashing power they have contributed to the pool. This allows miners to increase their chances of success without having to invest in expensive mining hardware.