Use of large vdu in entrance area
I'm not sure what digital signage is, but I suppose it achieves the same purpose as our large VDU.
We display mainly PhotoStories made from school trips, pupils' work, activities in school - sports, special assemblies, performances - and themed presentations that teachers have made for use in lessons.
These are occasional displays and are very popular: teachers often bring their classes to watch them.
Most of the time it is not in use. Several reasons: the head thinks it has more impact that way; work involved in generating new displays; not easy to set up (qv.)
I wasn't here when it was installed, but I'd be surprised if there was any discussion or thought about what it would be used for!
I gather real digital signage works over "switched ethernet" or "cat 5 as analogue..", but ours is simply a vdu. So I need to attach a computer via a VDU cable. The mistake we made (imo) was to have the socket installed in the head's office. He really does have a literally open door policy, but even so it is not always possible to get in to set up a computer just when you need to (meetings, confidential interviews, etc). If the socket were in the general office, the staff room, or even the boiler room, it would be easier.