Mobile Device Management (MDM) is an additional layer of securing provided to a standard deployment of mobile devices. In the Apple management context, MDM provides our customers with a way to make sure that they can monitor devices, that devices fit within the boundaries of what our customers consider to be good security, making it easier to setup devices (by quickly providing WiFi information, helping to deploy apps, etc) and of course by getting a good inventory of the devices you have out there in the wild.