You can and should be guided by this indicator, but do not take the specified payout percentage of the slots too literally. I want to emphasize that this period of time is INDEFINITE. Knowing the payout percentage of the slot machine, you can roughly understand how much of the money you spent on the game will return to you after some indefinite period of time. Slots payout percentages is an indicator that expresses the percentage of your bets placed to your winnings. First, I would like to clarify what slots payout percentages is.