Final answer:
The most common type of sales promotion is a coupon offer.
Step-by-step explanation:
The most common type of sales promotion is typically a coupon offer. A coupon offer provides customers with a discount or special deal on a product or service. This can be in the form of a physical coupon that is presented at the time of purchase or a digital coupon that is redeemed online.
For example, a grocery store might offer a coupon for $1 off a specific brand of cereal, encouraging customers to purchase that product. The coupon offer incentivizes customers to choose a particular brand and can help increase sales.
While rewards programs, sales, and contests are also common types of sales promotions, a coupon offer is typically the most widespread and widely recognized.