Which of the following is a channel used to communicate sales promotions?

Word-of-mouth is a powerful channel for communicating sales promotions because it relies on personal recommendations and shared experiences among consumers. When a satisfied customer shares their positive experience with a product or promotion, it can influence potential customers who trust the opinion of their friends or family. This method is not only cost-effective but also tends to carry more weight with consumers compared to paid advertising methods. Effective use of word-of-mouth can increase awareness of sales promotions and drive more traffic to a business, making it a crucial channel in sales strategy. The other options, while relevant in the context of marketing, do not serve as channels for directly communicating sales promotions. Market segmentation refers to the strategy of dividing a market into distinct groups to target them more effectively, product development focuses on the creation of new products, and brand positioning deals with how a brand is perceived in relation to competitors.