When you jump into an online slot, the RTP tells you how much you can expect...

https://www.golf-bookmarks.win/when-you-play-online-slots-understanding-rtp-and-volatility-helps-you-know-1

When you jump into an online slot, the RTP tells you how much you can expect back over time—usually around 95% to 98%. Volatility shows if wins come big and rare or small and steady