Windows 10 operating system comes with pre-loaded apps and many of these apps run in background. This may also cause your machine run slower. As a matter of fact, some of these apps may just be useless for you. They are just consuming unnecessary resources on your machine. You may just want to turn them off.
To see what apps run on your machine, search "background apps" and select the first option you see.
You will go to System Settings > Background Apps and can see what apps running in background on your machine. Here you may also turn off and on these apps.
Personally, I have most of them turned off.