If your iOS device has ever been misplaced or stolen, a built-in feature called "Find My iPhone" can pinpoint and lock or delete the exact location of your gadget if you think it's in the wrong hands is advised.
Although Find My iPhone is useful, you may need to turn it off. Maybe you think someone has access to your Apple ID and can now track your location. Or you sell your device and need to disable Find My iPhone before you can delete it. You may only want to clean your iPhone of all the services you are tracking ̵