What Does Superserver Mean?
In UNIX environments, a superserver, also sometimes called a service dispatcher, is a daemon that is used for managing other servers. A daemon is a program that runs in the background; it is similar to a Windows service.
Techopedia Explains Superserver
Typically, a superserver is programmed to start other servers as necessary. Using protocols like TCP and UDP, the superserver spawns processes and delegates sockets to set up operations for servers that are rarely used. This type of administration is commonly documented in developer handbooks as part of network administration for handling server loads.