When you spin an online slot, the RTP tells you the average payout you can...

https://www.pawn-bookmarks.win/when-you-play-slots-online-understanding-rtp-and-volatility-gives-you-a

When you spin an online slot, the RTP tells you the average payout you can expect over time—usually expressed as a percentage. Volatility shows how often and how big those wins might be, from steady small hits to rare big jackpots