The Device Manager
The Unreal Device Manager, is nothing more than a device manager!
In fact, this tool has not that much to do with either development or profiling, but knowing it might be useful, especially when it comes to building the game in the next chapter, where you have the chance to deploy it directly to a device:
The Device Manager gives you the chance to add devices to the Unreal environment; any type of device that can be connected to your PC is acceptable. It also allows you to read some information about the selected device, check a list of the running processes, and even shut it down or restart it if you want.
The most important part here is when you have a device which doesn't know if it is supporting a certain feature of the engine, then you can simply connect the device, and add it to the list. You could check the Device Details section of the Device Manager to learn about the supported and unsupported features on that device: