The Promo Code content block is are available to users who connect a supported e-commerce store or custom API 3.0 integration.For more information on the new builder, check out Design an Email in the New Builder. This article tells you how to use Promo Code content blocks for the classic builder.Here are some things to know before you begin this process. In this article, you'll learn how to use the Promo Code content block. Drag and drop the Promo Code content block into your layout, and choose the promo code you want to share. Add a promo code to your email or page to promote special offers and increase orders in your online store.