What is RTP?
Theoretical return and what it tells you about a game.
RTP stands for Return to Player. It describes the theoretical return of a game over a very large number of rounds. It does not tell you how a single session will end.
Your session may differ significantly from the theoretical return. A stated RTP does not guarantee that you will receive a particular share of your stakes back.
Read the game information for the version you actually play. Never treat RTP as a promise or a way to make money.
Source: Gambling Commission
Gamble responsibly