Hey Steve,
Just to confirm – you want to track people who are clicking on your AdWords ads and then filling out the WPForms forms on your website – is that correct?
The first step would be to set up conversion tracking for your forms.
Google Analytics does not offer this out of the box, but there are a couple of ways to go about this. You could redirect users after form submission to a special “thank you” page and track visits to that page as a goal: https://www.monsterinsights.com/how-to-create-a-goal-in-google-analytics-to-track-conversions/
For an easier method, we recommend using MonsterInsights Pro, a Google Analytics plugin for WordPress, and its Forms Addon. Basically you just install the plugin and it will track your form conversions automatically – no need to edit any code or configure settings:
https://wpforms.com/how-to-use-google-analytics-to-track-form-submissions-in-wordpress/
After your tracking is set up, you can go into Google Analytics to look at your form conversions.
Then it’s just a matter of looking at your AdWords reports to see how many of those form conversions came from your AdWords campaigns: https://support.google.com/analytics/answer/1247853
I hope that helps! 🙂