System Preferences does not only help modify programs that came with your computer, it also works with programs you've installed.
If an application has it's own spot in system preferences it most likely runs on startup and is using up power.
It is a good idea to keep an eye on what you have installed. Check the "Other" section for things you don't use very much.
Whatever you don't use, get rid of. These types of Apps usually come with Uninstallers that will do the job. Run the Uninstaller to remove the program.
Now in the unfortunate event where the Uninstaller is lost you can do 1 of 3 things:
- Download the program again and see if it comes with an Uninstaller.
- Invest a bit of money in a program like AppZapper. It allows you to properly remove any plugins, programs or special settings you have on your computer.
- Leave it alone.
This may not sound like much, but doing this can really lessen the load on your computer.