A Bitcoin mining pool share is a portion of the total hashing power that a miner contributes to a mining pool. This share is calculated by dividing the miner’s hashrate by the total hashrate of all miners in the pool. The reward for mining a block is split among all miners in the pool according to their respective shares.

Mining pools are groups of miners who work together to increase their chances of finding a block. By pooling their resources, miners are able to achieve more consistent rewards and reduce the variance of their returns. When a block is found, the reward is split among all miners in the pool according to their shares.

The size of a miner’s share is determined by their hashrate. The higher the hashrate, the larger the share. Since more hashing power increases the chances of finding a block, miners with higher hashrates typically receive larger shares of the reward.

Mining pools typically charge a fee for their services. This fee is usually taken from each miner’s share of the reward. The fees are used to cover the cost of running the pool, as well as for profit.

In summary, a Bitcoin mining pool share is a portion of the total hashing power that a miner contributes to a pool. The size of the share is determined by the miner’s hashrate, and the reward is split among all miners in the pool according to their respective shares. Mining pools typically charge a fee for their services, which is taken from each miner’s share of the reward.