To use a hidden field, first drag and drop the form widget onto the page. Hover over the form widget and click on the pencil icon. Next, drag and drop an advanced hidden field. Double click on the field and click the pencil icon to edit it.
Hidden field provides you with an innovative way to label a field in your form without the recipient seeing it.
Now you can label a field in your form, for example, location page or special product page, so that when you receive the contact notice you'll know exactly where it was sent from. This is known as segmentation. This is not something you'll want your visitors to see so it's hidden from them.