Tracking code for google adwords

Hello.

Where can I add additional html code to track some ads that drive visitors to this form?

Thanks.

Unfortunately, this is not possible, since adding script codes in the builder was disabled for security purposes. 

The only option would be using the form's source code, and just add your tracking code within the source code scripts: https://www.jotform.com/help/104-How-to-get-the-Full-Source-Code-of-your-Form 

Or you can try just our Google Analytics widget: https://widgets.jotform.com/widget/google_analytics 

Let us know if you need more help.