When you pick an online slot, knowing its RTP and volatility can save you from...

https://mill-wiki.win/index.php/What_Makes_a_Casino_Platform_Easy_to_Use%3F

When you pick an online slot, knowing its RTP and volatility can save you from surprises. RTP tells you the average return over time, usually around 95-97%, while volatility shows how wild or calm the wins might be