A bonus multiplier in a slot game is a feature that multiplies your winnings by a certain amount when activated. This multiplier can apply to specific wins, such as those made during free spins or bonus rounds, or it might be a feature of the game that can be triggered at any time.
The value of the multiplier varies depending on the specific game. It could be a fixed amount, such as 2x, 3x, or 5x your win, or it could be a variable amount that changes depending on other factors, such as the number of special symbols you land on.
It's important to note that not all wins may be eligible for the bonus multiplier. The game rules will specify when and how the multiplier applies, so it's always a good idea to familiarize yourself with these rules before you start playing.