If you aren't a system administrator, but have technical questions that you want to bring to your system administrator, this is the place for you. Do you feel bad that you keep interrupting your office IT person with questions? Maybe you should try SuperUser first. You might get your answers faster.
Whether it is a question about your home cable modem, or the mysteries of having to reboot after uninstalling software (this discussion will surprise you); this community will probably reduce the number of times each week that you interrupt your IT person.
If you are a system administrator, and like to help people, consider poking around the unanswered questions page!
Happy Sysadmin Appreciation Day!
P.S. "The Practice of System and Network Administration" is InformIT's "eBook deal of the day" and can be purchased at an extreme discount for 24 hours.