In this video, I show you step by step how I set up Google Ads conversion tracking for a Shopify store using a theme-independent dataLayer. Most Shopify tracking breaks when you change or update the theme, so my goal here is simple: make the tracking stable, consistent, and not dependent on theme scripts. I start from Google Ads by creating a new website conversion action (I focus on Purchase because it’s the most important and a bit more complicated), then I bring the Conversion ID and Label into Google Tag Manager. Inside GTM, I set up the Google Ads Google tag (fires on page_view) and the Conversion Linker (to keep the GCLID working properly). Then I build the Purchase conversion tag using dataLayer variables like ecommerce.value, ecommerce.transaction_id, and ecommerce.currency. I also show how I pass product-level data using the Google Ads array structure (item id, price, quantity) with a Custom JavaScript variable, because accurate sales reporting matters. Finally, I configure Enhanced Conversions (User-Provided Data) for Purchase only—email, name, address, and other customer fields—because those details are available on purchase, not on add_to_cart or begin_checkout. After publishing, I verify everything in preview mode and explain why Google Ads may show “inactive” for a few hours even when the tags are firing correctly.