When you play online slots, RTP tells you the average money returned over...

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

When you play online slots, RTP tells you the average money returned over time—think of it as your long-term payback rate. Volatility shows how often and how big wins might be, so you’re not left guessing if it’s mostly small wins or rare big hits