Discounts are something everybody uses, especially when you want people to buy a certain product. Discounts are everywhere, and you have probably noticed there are a lot of different ways to give that discount.
The discounts are only available for a specific period of time. If people don’t buy the product now, at the discounted price, they’re likely to miss out on saving some money. There is urgency involved. That anticipation of missing out is exactly why discounts work.