Ecwid
Tag Manager
On the Ecwid Control Panel: Go to Sales Channels > Website > SEO Edit the Head meta tags & site verification & paste GTM here.
Adding Value Tracking
Go to Configuration > Settings > General > Tracking & Analytics Find "Custom tracking code on Order Confirmation page" If this isn't enabled then enable this & then Edit code.
Add the below:
<script> window.dataLayer = window.dataLayer || []; dataLayer.push({'order_id' : '${order.number}'}); dataLayer.push({'order_value' : '${order.total}'}); dataLayer.push({'event' : 'order-submitted'}); </script>