When you play online slots, the RTP number tells you how much you might get...

https://fantasynamezone.com/why-players-are-paying-more-attention-to-how-online-games-actually-work/

When you play online slots, the RTP number tells you how much you might get back over time—think of it as a rough guide, not a guarantee. Volatility shows if wins come fast and small or slow and big