RTP is a long-run average; the house edge is the casino’s expected share: 96%...

https://www.bookmark-jungle.win/rtp-is-a-long-run-average-not-a-promise-for-tonight-96-rtp-means-a-4-house

RTP is a long-run average; the house edge is the casino’s expected share: 96% RTP = 4% house edge. Volatility affects how wins and losses are spaced. In a short session, results can differ sharply from the average—RTP doesn’t guarantee a return.