Task Manager shows you what programs are running on your Windows computer and provides some limited control over these running tasks.
Windows Task Manager | Complete Tutorial for Beginners
Although Windows Task Manager is an advanced tool with many capabilities, it's most often used for something very basic: seeing what's currently running.
Of course, the programs that are open are listed, as well as the programs that are running 'in the background' and that were started by Windows and your installed programs.
Task Manager lets you force-quit any of your running programs, as well as see how many individual programs are using your computer's hardware resources and which programs and services start when your computer starts.