Hi @Illia,
Thanks for sharing this question with our community.
I assume you’re referring to a Shopify newsletter sign-up section? If so, Klaviyo’s Shopify integration provides three options for syncing your signup forms to Klaviyo:
The first option will guide you through getting your Shopify sign-up to funnel subscribers into your Klaviyo list. Also keep in mind, if a new subscriber sign-ups through a Shopify form, they must confirm their subscription before they’ll be subscribed to a Klaviyo list. This is a part of Klaviyo’s double-opt in process. You can change your Klaviyo list to single opt-in if you wish to circumvent the confirmation step altogether, although it is not recommended.
I hope that’s helpful and thanks for being a member of our community.