Step 1: Copy Novocall Widget Code
Log in to your Novocall account.
Navigate to "Inbound" > “Installations” > "Widget"
Copy widget code.
Step 2: Go to Google Tag Manager
Open Google Tag Manager, click to add a New Tag and then choose to create a Custom HTML Tag.
Paste the Novocall widget code in the HTML field.
Step 3: Create Tag
Choose to fire the tag on All Pages and click Create Tag.
Step 4: Publish Changes
After choosing a name for your tag click the Save button. And then press the Publish button to publish the changes.