*'''Not used''' - This field will not appear on your booking page.
*'''Compulsory''' - A manual booking or a booking on the booking pace can not can not be completed without entering this information.
*'''Compulsory' Booking Page''' - Your guests can not proceed the booking on the booking page without entering this information.
*'''Optional''' - Show the field on your booking page but leave it to your guest to enter information or not.
*'''Internal''' - This field will not appear on your booking page but is still available in the control panel to collect and store internal information about each booking.