A Sales Promoter is a brand's sales representative at a retail store. While the store may employ a number of floor sales staff whose responsibility is to assist customers with whatever they need to buy, a Sales Promoter is employed by a product manufacturer or brand and deployed on the shop floor to maximize the sales of that brand. The Sales Promoter is trained in her own company's products, and will often try to influence customers in the store by demonstrating the features and benefits of her products, and by favorably comparing is to competitors.
Companies that deploy Sales Promoters at retail stores often do that along with other retail investments such as a dedicated display and sales area in a store such as a shelf, gondola or Shop-in-Shop.