What is the role of Apple's 4s satellite positioning function?

Mainly used for navigation and providing your location information for software, such as weather software, which will provide you with the weather information of your current location after positioning. In addition, the approximate location of the mobile phone can be found by positioning, which is convenient for searching. If you want to turn it off, turn it off in Settings-Privacy-Location Services, and you can also set which applications have permission to use location services.