The Server Explorer window serves two purposes: it exposes various system services and resources that reside on your local machine and on remote machines, and it provides access to data connection objects. This tool also allows for direct management of Azure cloud-based resources and services and SharePoint instances.
As with the other Visual Studio explorer windows, the systems, services, resources, and data connections are viewed in a graphical tree format. Systems appear under a top-level Servers node (your local machine shows up by default), data connections appear under a top-level Data Connections node, Azure resources appear under an Azure node, and so on.
The Server Explorer window content and configuration are ...