On iPhones, go to the Privacy setting then scroll down to Apple Advertising, and then switch off Personalized Ads. On newer ...

This helps to estimate the phone's position if, for example, you're inside a building blocking a GPS signal. One reason to use this function is to show someone you're meeting exactly where you are.

Phones use various signals to find your location, including cell tower pings, Wi-Fi access points, Bluetooth and GPS. Sometimes your phone needs to know your location to provide a useful service ...