When you play online slots, the RTP tells you how much you can expect to get...

https://www.phone-bookmarks.win/understanding-rtp-and-volatility-is-key-to-picking-your-favorite-slot-rtp

When you play online slots, the RTP tells you how much you can expect to get back over time—usually around 95% or higher. Volatility is all about risk versus reward, showing if wins come small and steady or big but rare