In today's vehicles it's pretty much just a check over, fuel filter air filter, and spark plugs. Most of the time the plugs need to be changed about every 75,000-100,000 miles. Years ago there used to be a lot more that needed to be done.
What is done during a typical vehicle tune up?
Checking all the sensors with a obd scanner first then maybe spark plugs and ign wires and clean throttle body. Change air aand fuel filters