The document provides steps for a customer to purchase a product by scanning a QR code using the Paytm app. It outlines scanning the QR code to search for a product, selecting the product, applying any promo codes, paying for the order, and sharing the pickup code with the seller. It also describes how the customer can check the order details and pickup code in the app, as well as any offers or vouchers available in under 24 hours after delivery is marked by the seller.