Should you advertise on mobile only?

Yes, if the person who books or calls does it from the phone and the destination reads there. Do not switch the computer off if some appointments — clinic, groups, catering — are asked for from a desk. For a week, ask where the booking came from: a phone in the street or an email from work. Set the device to that answer, not to a fashion. Desktop is excluded for a Madrid clinic and the appointments reception gets by midday email are lost. The ad only caught the person walking past. The device setting in writing: mobile only, or mobile plus desktop in appointment hours. It is reviewed against real calls, not against the panel percentage.