RTP estimates how much a game returns over time; the house edge is the casino’s...

https://www.echobookmarks.win/rtp-is-a-long-run-average-not-a-session-forecast-96-rtp-means-a-4-house

RTP estimates how much a game returns over time; the house edge is the casino’s average share. A 96% RTP means a 4% house edge. Volatility shapes swings: results can vary sharply, and a short session may not match the long-run average.