Set expectations before you start playing
Scatters land at random across the 6x5 grid, so nobody can tell in advance when four of them will show up and start the free spins. How often the bonus round comes is not known before you play. The result of one session is random too, whatever the RTP of the version you play.
Every spin on the reels follows one RTP version, and only the game rules state which version is running here. Two versions exist, so the game rules are the place to check before you compare payout figures with another lobby or site.
Spins on the reels can pay up to x21,100 your bet, the ceiling of this slot. That ceiling is reached very rarely, so treat it as the upper limit of the game and not as something a session will reach. A win that size is not an expected result of any session.