In Management Portal > Agent/Skills/Services > Services, a service can be added. This service can be set in the IVR/application. This article identifies the object or variable that contains the Service name. Please note this object/variable is not the exact name of the service but the name of the object that contains the service value.
The object/variable of the Service is "ServiceType". When referencing this service object in the IVR you will use the property %ServiceType%.