The hidden text element is a data element that is not visible to the form responder. It can be very useful when you want a form to submit data that you do not need the end user to see.
In addition to the basic element properties, hidden text elements allow for the following:
Dynamic Forced Values
Dynamic forced values allow the submission value for the element to be calculated or based upon other form elements and data entries (IE sum, product).
Use Case Considerations:
Because they are not seen by the user, hidden text elements are a way to capture calculated data or provide the basis for workflow to the form without having the end user see or be provided the opportunity to edit the data.