How Does a Mining Pool Divide the Work of Finding a Valid Nonce?

A mining pool divides the work by assigning each miner a specific, non-overlapping range of nonces to search within. The pool's software also allows miners to search for 'shares,' which are hashes that meet a lower difficulty target than the actual network difficulty.

When a miner finds a share, they submit it for credit. When a valid block is found, the reward is distributed based on the number of shares contributed.