RTP estimates the share of stakes returned over time; the house edge is the...

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

RTP estimates the share of stakes returned over time; the house edge is the casino’s expected share. A 96% RTP means a 4% house edge. Volatility shapes how wins and losses swing. In a short session, results can differ sharply from the average.