RTP estimates a game's long-run return: 96% RTP means a 4% house edge....

https://paxtonsexpertop-ed.zenbloomer.com/posts/is-expected-value-the-same-as-most-likely-outcome

RTP estimates a game's long-run return: 96% RTP means a 4% house edge. Volatility describes how uneven results may be. In a short session, you can win or lose far more than the average suggests; RTP is no guarantee of an outcome.