There are two types of product scarcity commonly used to boost sales:
Scarcity based on quantity – for example, “Only two seats remaining at this price!”
Scarcity based on time – for example, “Final day to purchase!”
Be careful: if you increase the quantity or extend the deadline, it will feel like a gimmick. Many brands do this, but it often erodes trust. Keep it honest so customers truly value the offer and feel the urgency to act now.