478 bytes added,
12:37, 7 February 2013 You will need your guests Email address to correspond with them. Therefore the default for this setting is "Compulsory". You may change it though to:
*not collect this information - the field will not appear on your booking page: set to not used
*make it obligatory meaning your guests can not proceed the booking without entering this information: set to compulsory
*show the field on your booking page but leave it to your guest to enter information or not: set to optional