Shopify's built-in analytics tells you what sold. It doesn't tell you why, and it definitely doesn't tell you what to do next with your ad budget. That gap is exactly where most Heads of Growth get stuck: staring at order data that's technically accurate but practically useless for making a channel decision by 10am. Good ecommerce analytics for a Head of Growth at a Shopify brand needs to connect ad spend, GA4 behavior, and actual revenue into one number you can act on, not three dashboards you have to reconcile by hand.