A tune-up is geared towards optimizing the vehicle. It is a good idea to have a tune-up performed twice a year, and before you head out for any kind of road trip or long adventure. The goal is to have the vehicle running like new, or as close to new as possible. When these components are cleaned and inspected regularly, problems with the engine are much less likely. When the engine is running at its best wear is reduced, efficiency is optimized, and your vehicle lasts longer.
Again, what exactly your tune-up entails will depend on what you drive, how old the vehicle is, and where you take the vehicle to have the tune-up performed. The more intensive a tune-up is, the most expensive it will likely be. However, the more often you maintain the vehicle, the less you will spend on repairs in the long run. Regular maintenance is much cheaper than letting all of your car’s issues pile up.