RTP is a game’s long-run expected return; the house edge is the share it keeps....

https://www.bookmark-url.win/rtp-is-a-game-s-long-run-average-return-96-rtp-means-a-4-house-edge

RTP is a game’s long-run expected return; the house edge is the share it keeps. A 96% RTP means a 4% house edge, not a promise for tonight. Volatility shapes how wins and losses arrive. In a short session, results can swing sharply and differ widely.