There are many common reasons why you might want to track the location of one or more iPhones. For instance, you might be a parent, keen to make sure that you know the exact whereabouts of your children at all times. This can be an important safety feature in those kinds of scenarios. Alternatively, you might be running a business where you have a legitimate need to track where your employees are. That might include running a taxi service and any other transportation company, for example.