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

https://www.yankee-bookmarkings.win/rtp-is-the-game-s-long-run-average-return-96-rtp-means-a-4-house-edge-not-a

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.