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

https://www.primary-bookmarks.win/rtp-is-a-long-run-average-house-edge-is-the-casino-s-expected-share-96-rtp

RTP is a long-run average, not a session promise: 96% RTP means a 4% house edge over time. Volatility shapes how wins arrive—often or less often, and in larger or smaller amounts