1. Go to the Dashboard and select one of the two options:
2. Copy the Synchronous version of the tracking code:
3. Go into your WordPress Dashboard on the “Appearance” tab and click on “Editor”:
4. In the list of Templates, search for the one with the description of “header.php”, select it and paste the tracking code right after the opening of the <head> tag:
5. Click on Update file and wait 10 minutes in order for the information to be processed: