You’re likely referring to a **”Bonus Boost Slots”** feature, which is common in:
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### **1. Mobile / Casual Games**
Often seen in **idle games, clicker games, or gacha RPGs** as:
– **Extra reward slots** in a “prize wheel” or “loot box” opening.
– **Temporary boost slots** that let you equip more bonus items (like XP boosts, currency multipliers, etc.) for a limited time.
– **Event mechanic** — during an event, you unlock extra slots to earn more event currency or points.
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### **2. Casino / Slot Machine Games**
In video slot games, “Bonus Boost Slots” could mean:
– A **feature that increases the number of free spins or multipliers** during a bonus round.
– A **buy-a-bonus option** where you pay extra credits to trigger bonus features more often.
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### **3. Progression / Battle Pass Systems**
Some games let you unlock **”boost slots”** in a battle pass where you can insert tokens to:
– Increase battle pass XP gain.
– Get extra challenge rerolls.
– Boost event progression.
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### **4. Sports or Management Games**
In games like FIFA Ultimate Team or racing team managers:
– **Boost slots** might be positions where you can insert consumable cards (fitness, morale, training boosts) to enhance your team/player temporarily.
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If you have a **specific game in mind**, I can give more precise details!