To install Freshmarketer JS snippet on all your pages using Google Tag Manager, follow the guide below.
As an initial step, copy the Freshmarketer JS snippet (Asynchronous) into your clipboard.
Give “Freshmarketer Integration” as the Tag name and select the edit icon from the Tag Configuration section.
"Tag Configuration" Section
Locating "Custom HTML"
As Google Tag Manager doesn’t support synchronous code execution, paste Freshmarketer’s asynchronous JS snippet.
Click Save button.
Freshmarketer code is now installed on your site. You may Verify your code installation before launching the experiment.