Go to https://tagmanager.google.com/ and login with your personal login details.
In the Google Tag Manager UI, navigate to the menu option Admin.
Go to Install Google Tag Manager.
You now see two code fragments that need to be implemented on your Platform Demo website.
You’ll need to update your Configuration ID settings and enter those two code fragments on the Update Configuration ID page of the AEP Demo website Admin pages.
You’ll then see this:
Click Load Configuration. After clicking Load Configuration, scroll down until you see the fields GTM Head Tag and GTM Body Tag.
Go back to Google Tag Manager. First of all, copy the first code fragment.
Go back to the Update Configuration ID screen and paste the code that you copied in the field GTM Head Tag.
Next, go back to Google Tag Manager.
Copy the second code fragment.
Go back to the Update Configuration ID screen and paste the code that you copied in the field GTM Body Tag.
Next, scroll down and click Update Configuration ID.
After this change, your website and configuration are ready for Production!