In theory, the tag server is about
a computer program running to serve the requests of other programs or a physical computer dedicated to running one or more such services.
The first meaning (a computer program) is a useful one: there are many questions about server programs. The second meaning (a computer dedicated to running server programs) is not: hardly any question is specifically about server computers. In practice, the tag server is mostly used to mean “the computer where I'm having this problem doesn't have a console”, which is just as useless information as the color of the shirt that the asker is wearing.
Let's just get rid of server.