Hello @Giovannihair101,

Thanks for sharing your question with the Klaviyo Community!

When integrating Shopify with Klaviyo, your contacts from Shopify would automatically be synced and shared to Klaviyo. You can find these contacts shared from Shopify under the Profile tab of your Klaviyo account. Keep in mind, contacts shared from Shopify to Klaviyo would not automatically be added to a Klaviyo list from the integration. As called out in the Configure the Integration section of the How to Integrate with Shopify Help Center article:

Klaviyo will not automatically sync historical subscribers to a list when a customer checks "Subscribe new customers to a Klaviyo list." If you need to add historical subscribers to your newsletter list, you can do so with property and flow editing utilizing the steps outlined in How to Add or Combine Lists Without Triggering a Flow. You can also add subscribers to a list manually by following How to Add Subscribers to an Existing List. 

You can however collect new subscribers through your Shopify signup forms so long as you have the Accepts Marketing setting enabled as part of your Shopify integration settings and have updated the code for your Shopify forms to include the following hidden input group tag: <input type="hidden" name="contactatags]" value="newsletter">

Alternatively, you can also replace your Shopify signup forms with Klaviyo ones; which would automatically be linked to a Klaviyo list of your designation!

I hope this helps!

David