RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge...

https://www.play-bookmarks.win/rtp-is-a-long-run-average-not-a-promise-for-one-session-96-rtp-means-a-4

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility describes how uneven results can be. In a short session, you can finish well above or below the average.