RTP shows the long-run share a game is designed to return; a 96% RTP means a 4%...
https://www.bokkmarking-signs.win/rtp-estimates-a-game-s-long-run-returns-the-house-edge-is-the-casino-s
RTP shows the long-run share a game is designed to return; a 96% RTP means a 4% house edge, not a promise for one session. Volatility affects how results swing: higher volatility can mean bigger wins and longer dry spells