Thank you for taking the time to watch this video.
Here’s the additional code referenced in the video to add above your Google Tag Manager code:
<script>
window.dataLayer = window.dataLayer || [];
</script>
Here’s the code to the Regular Expression for the trigger in Google Tag Manager:
view_item|view_item_list|select_item|add_to_cart|remove_from_cart|view_cart|begin_checkout|add_payment_info|add_shipping_info|purchase