We're switching to a new Shopify theme, will this affect our Klaviyo integration?
No, changing themes in Shopify will not interrupt the built-in integration. Order and customer data will continue to sync to Klaviyo. However, you'll need to re-add the viewed product tracking snippet. The HTML edits are not transitions with the new theme, so you'll need to add these again to track site activity in Klaviyo.
Additionally, any signup form that is built into the theme will need to be redirected to Klaviyo or swapped out for a Klaviyo form.