Upselling is a sales technique where a seller invites the customer to purchase more expensive items, upgrades, or other add-ons to generate more revenue. While it usually involves marketing more profitable services or products,[1] it can be simply exposing the customer to other options that were perhaps not considered.
It is distinct from cross-selling, in which a seller tries to sell something else. In practice, large businesses usually combine upselling and cross-selling to maximize revenue.