Step 1: Create the discount code in Shopify
Step 2: Choose the Email Signup popup type
New popup on the app's homepage, then select the Email Signup popup type. Click here for more information on creating your popup.
Step 3: Include your discount code in your popup
Move to the Content stage of the popup editor and fill out each field. In the Confirmation field, write a message that includes the exact discount code you created in your admin. What you enter in the Confirmation field is only shown once a customer enters an email address, so your discount code will be revealed once a visitor signs up for your newsletter.
Make sure the discount code you create in your popup matches the one you made in your Shopify admin.