RTP estimates a game’s long-run returns; the house edge is the casino’s...

https://riversinspiringcolumn.urbanvellum.com/posts/how-do-i-avoid-getting-tilted-after-a-long-losing-streak

RTP estimates a game’s long-run returns; the house edge is the casino’s theoretical share. At 96% RTP, the house edge is 4%. Volatility shapes swings. In a short session, results can vary widely and may fall far below the RTP.