1. Login to the Admin Page:
The URL will be look like this: https://Your-Shop-Name.myshopify.com/admin/
2. Select “Themes” on the left-hand menu:
3. Select “Actions” and press “Edit code”:
4. Double check you are editing the file called “theme.liquid”:
5. Scroll down to the bottom and peaste the tag code you have been provided before the closing “</body>” tag:
6. Save the changes and the set-up the set-up will be completed:
Your Tag should now be live on your Site!