Cross-selling is a sales technique used to encourage customers to purchase additional, complementary products or services alongside the primary item they are buying. For example, if a customer is purchasing a smartphone, cross-selling might involve suggesting they also buy a phone case or screen protector. This strategy aims to increase the overall value of the sale by enhancing the customer's experience with related products. In contrast, [[up-selling]] focuses on persuading customers to buy a more expensive version or upgrade of the product they are considering. Using the same example, up-selling would involve encouraging the customer to purchase a higher-end smartphone model with more features instead of their initial choice.