Field Properties allow you to edit specific settings of the selected field.
Here you can update:
Name - this is the name of the field that allows the user to know what to enter. If you plan to set up Form Notifications via email, be sure to avoid using "&" in the Filed Name.
Placeholder Text - Not available in all fields, but if you see it, you can put in an example of what the user can put in the box
Help Text - You can place a brief explanation of what you’d like the users to put in the field
If you select the Required box under the Validation tab, this will make the field required to be filled out before the form is submitted.