As an e-commerce merchant, increasing your average order value is essential to your success. Checkout upsell apps allow you to offer customers additional products at checkout that complement the items in the customer's cart, increasing your average order value and boosting your bottom line. These apps also allow you to cross-sell products, upsell related products, and create bundles. Most also allow you to add countdown timers or create limited-time discounts to increase urgency and encourage customers to buy now.