Mining Pool

A mining pool is a group of miners who combine their computing power and share block rewards in proportion to the work each contributes. Solo mining on a large network is a lottery: an individual miner might statistically wait years to find a block. By pooling hash rate, participants convert rare, large payouts into small, frequent ones, making income predictable enough to cover electricity bills.

In practice, the pool operator runs coordination servers that hand out work assignments and collect "shares" — partial solutions that prove each miner is contributing. When any pool member finds a valid block, the reward goes to the pool and is split according to shares submitted, minus a small operator fee. For example, a miner contributing 0.1% of a pool's hash rate would receive roughly 0.1% of each block reward the pool earns, under a proportional payout scheme.

A common misconception is that a pool controls its members' coins or hardware; miners can point their machines at a different pool at any time, and payouts are typically automatic. Pools do raise a centralization concern, though: if a few large pools coordinate a majority of the network's hash rate, they gain outsized influence over which transactions get confirmed, which is why the distribution of hash rate across pools is watched closely.