Promotional mechanics refers to the detailed workings of a promotional campaign. It can take various forms, ranging from the simplicity of an immediate discount at the checkout with a coupon to a complexity that can sometimes be bewilder consumers and retailers. The goal of an effective promotional mechanic is to be easy for the consumer to understand and implement, while creating a perception that is more valuable than the actual generosity. Its success depends on its profitability and efficiency for the manufacturer or retailer, particularly through the post-promotion impact on sales. This approach also encompasses the allocation of logistical and financial costs between the manufacturer, the promotional agency, and the retailer. A concrete example of a promotional mechanic would perfectly illustrate these principles in action.