When you play online slots, the RTP tells you the average return you can expect...

https://www.4shared.com/office/GRZTnFKffa/pdf-13781-9024.html

When you play online slots, the RTP tells you the average return you can expect over time, usually around 95% to 98%. Volatility shows how often and how big the wins might be—low means frequent smaller wins, high means rare but bigger payouts