Do you know what UTM codes are? Well if you do - you’ll surely be happy to hear that we’ve added a few new system value options to our hidden field, that will allow it to store UTM codes such as: Source, Medium, Campaign, Term, and Content.
If you don't...than UTM codes (“Urchin tracking module.”) are added to the end of regular URL’s and are designed to tell Google Analytics more about each link and which marketing campaign it relates to.
For example: yourForm_URL?utm_source=amy#/
Watch how to capture UTM data in a hidden field
Enjoy!