A Growth Multiplier is a system, primarily used in free spins bonus rounds, where the multiplier value automatically 'grows' based on the passage of time or the achievement of specific conditions. Its most distinct characteristic, unlike an 'Accumulating Multiplier' that increases with each win, is that the multiplier advances to the next level when a specific condition is met, regardless of whether a win occurred. This provides a guaranteed expectation that rewards will definitely increase towards the end of the round.