Upselling and cross-selling are powerful ways to increase the average order value without acquiring new customers. Upselling involves encouraging customers to purchase a higher-end version of a product, while cross-selling suggests complementary items. Product recommendation sections, like the Frequently Bought Together or Customers Also Bought,” can subtly guide shoppers toward additional purchases. Limited-time offers and bundle deals also create a sense of urgency and perceived value. Post-purchase upsells, where customers are offered relevant add-ons after completing their order, are effective.