What Is the Difference between a ‘Valid Share’ and an ‘Invalid Share’?
A 'valid share' is a proof-of-work submitted by a miner that meets the pool's difficulty target and is submitted before a block is found. An 'invalid share' is one that fails the pool's validation checks, often due to incorrect data, high latency (stale share), or submission after the pool has already solved the block.
Invalid shares earn no reward.