Replace the default annoying "Out of Stock" button with an inviting "Pre-Order" button. Pre-sell products even when they’re out of stock or coming soon. It's, enhances selling, and makes a better customer experience. Customers like to make pre-orders for their favorite products which are out of stock or coming soon. Create hype around new product launches by offering them available for pre-order. Allow your customers to buy products before they become available, and increase your AOV.