RTP is a long-run average; house edge is the casino’s mathematical share: 96%...
https://stephensexpertword.publishlane.com/posts/what-s-the-difference-between-volatility-and-risk-for-a-slot
RTP is a long-run average; house edge is the casino’s mathematical share: 96% RTP = 4% house edge. Volatility describes how uneven results can be. In a short session, wins or losses can swing well away from the average—RTP doesn’t predict your outcome.