Re-spins - Receive an extra spin at your current stake for free, often with symbols held in place.Free spins - You'll receive a number of free spins at your current stake where you keep any winnings and can’t lose any money during the bonus.The different types of bonus games and features in slot machines are: Bonus rounds or features are mini-games within online slots, commonly triggered by hitting a selection of symbols (typically three scatter symbols, or a pair or more of other symbols), and bonuses can also be triggered at random.