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

https://charlottessuperjournals.tearosediner.net/how-many-rounds-does-rtp-need-to-be-accurate

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