RTP describes the long-run average return; the house edge is the casino’s...

https://www.phone-bookmarks.win/rtp-estimates-a-game-s-long-run-returns-the-house-edge-is-the-casino-s

RTP describes the long-run average return; the house edge is the casino’s expected share. A 96% RTP means a 4% house edge. Volatility affects how wins and losses are spaced—short sessions can swing sharply, so results may differ a lot from the average.