Definition - What does Ubuntu Server mean?
Techopedia explains Ubuntu Server
Some of the differences with Ubuntu Server include the replacement of a graphical user interface with a character-based interface for installation, as well as other changes to the interface. These can be customized by the user. The system is compatible with many different platforms like Microsoft Hyper-V and VMware ESX server.
Ubuntu Server can be an easy and convenient way to set up a simple home network. One other feature of Ubuntu Server is the ability to assign "super user" tasks to make it easier to administer the network, where using the original edition can be more challenging or labor intensive.