This allows the user to choose the type of service provided from the drop-down list. You create your own drop-down list of services to reflect your own business E.g. 1. A professional dog-walker may have a drop-down list which specifies 30 minute walk or 60 minute walk. E.g. 2. A massage therapist may wish to have separate services that specify the length of massage provided or whether the massage was on-site or a home visit.