The Return to Player percentage (also known as RTP%) is a calculation of what the player is likely to expect back over a period of time. Most online slots have an average RTP of 95%, which means that for every $1 bet placed, the player can expect to gain an average of $0.95 back in winnings. This doesn’t guarantee that the player will win this sum on every spin, though, as every result is always random in online slots.