Before a first spin, three figures are worth checking: the announced return to player, the volatility profile and the betting - https://dict.leo.org/?search=betting range available at the operator - http://dig.ccmixter.org/search?searchp=operator .

Volatility describes how the wins are distributed rather than how much comes back: Bookmaker hors arjel fiable - https://lucky-ducky.net/ a high volatility game pays less often but larger.

The maximum win, when it is published, gives the ceiling of a single round and helps decide whether a game matches a bankroll.