Sign in to Google Tag Manager. Select Tags > New.
Name the tag: Happierleads Tag. Select Edit on Tag Configuration.
Under Custom, select Custom HTML
Copy the Happierleads tracking code from the dashboard.
Paste code in the HTML field. Select Save.
In the No Triggers Selected popup, select Add Trigger.
Select All pages
The trigger has been added. Review and select Save.
The most important step now is to publish the tags.
Then add a name and description
and click Publish
The Happierleads tracking is code now installed.