RTP is a long-run average; the house edge is the casino’s expected share. A...
https://trentonsimpressivethoughtss.evergrovio.com/posts/why-do-casinos-advertise-rtp-if-it-doesn-t-predict-my-results-tonight
RTP is a long-run average; the house edge is the casino’s expected share. A game with 96% RTP has a 4% house edge. Volatility affects how uneven results can be. In a short session, you can win or lose far more—or less—than the average suggests.