What does the Alt + Tab key combination primarily do on a computer?

The combination of the Alt + Tab keys on a computer primarily functions to toggle between open applications. When you press Alt + Tab, it brings up a visual interface that displays all currently running applications. By holding down the Alt key and tapping the Tab key, you can cycle through these applications, allowing you to select the one you wish to return to quickly. This functionality enhances multitasking by making it convenient to switch back and forth between different programs without needing to use the mouse or navigate through menus.

Other options focus on different functions that may not pertain to application switching. Closing an application typically requires the use of the Alt + F4 key combination instead. The Start Menu is accessed using the Windows key, and system settings usually require navigation through the control panel or settings app rather than a quick keyboard shortcut like Alt + Tab.