Configure the popup and platform you want to use the run the newsletter feature.
Open Newsletter settings.
From your Shopify admin, go to Online Store > Themes.
Find the theme that you want to edit and click Customize.
In the left-hand toolbar, click Theme settings.
Platform: Specify the platform to run the newsletter feature. There are values: Shopify, Klaviyo, Mailchimp.
Terms and conditions
Show a checkbox with the link of your terms and conditions page. Customers need to tick to agree with your terms & conditions before subscribing to their email. This feature only works with the platform is Shopify.
Enable: turn on/off this feature.
Terms and conditions page: specify a static page to display your terms and conditions.
Error message: the message that is shown when customers subscribe to their email without ticking the checkbox.