Klaviyo signup forms are one of the first things most Shopify stores should set up after connecting Klaviyo. They help you collect email subscribers, grow your SMS list, promote offers, and send new contacts into the right welcome flows. Some forms appear automatically once Klaviyo is installed correctly on your store. In this guide, we’ll walk through how Klaviyo forms work on Shopify, how to create a signup form, how to add popup and embedded forms to your store, and what to check if your form is not showing correctly. Klaviyo Forms and Shopify: What You Need to Know FirstKlaviyo forms are created and managed inside Klaviyo, but Shopify controls where those forms appear on your storefront.