Confusion between API integration and pre-built integration

Hi there,

We’ve integrated our Shopify store with Klaviyo and have also set up website tracking. We’re planning to add the “Viewed Product” and “Added to Cart” events sometime soon. We plan to set up a Welcome Series flow, Abandoned Cart flow, Browse Abandonment flow, and Post-Purchase flow.  My question is that, is the pre-built integration between Shopify and Klaviyo enough to set up these flows or do we need additional integration via API?