You can easily pass UTM values to a hidden field on your form in order to track your ad source, campaign, or any other information you need.
Adding a hidden field to your form.
1. Click edit on your form and then Add a new field;
2. Select a new Hidden field;
3. Add your UTM Parameter name in the value field using square brackets, i.e. [utm_source]
Setting up your UTM Parameter.
For this example, we will use Facebook Ads.
Add your landing page URL including the UTM parameters to your ad.
Now your hidden field will be automatically populated from the UTM parameter and the information will be passed along with the lead information.