NetworkManager is a utility for managing network connectivity on your server, though it's not for everyone, and has largely been replaced with Netplan. This utility comes installed by default with older versions of Ubuntu Server, but it may not be included even on older versions if you're using a cloud appliance. Therefore, feel free to skip this section if you're not using a legacy version of Ubuntu Server as this won't apply to you otherwise.
NetworkManager is a service (also known as daemon) that runs in the background and manages your network connections. On a desktop Linux distribution, it does everything from managing connectivity, to managing your wireless networks. With it, you can configure profiles, and create custom connections you can switch between.
On servers, the added features of NetworkManager on a desktop distribution...
