RTP describes the share of stakes a game is designed to return over a very...

https://www.yankee-bookmarkings.win/rtp-is-the-game-s-long-run-average-return-96-rtp-means-a-4-house-edge-not-a

RTP describes the share of stakes a game is designed to return over a very large number of plays. A 96% RTP means a 4% house edge on average—not that you’ll get 96% back in one session