It's for location services based off of WiFi and such. Pretty much nothing you can do. You can opt out on your devices on a certain network, but even then if your network broadcasts a signal, it's being scanned and uploaded.
The only thing you can do is prevent your device from connecting to (or even just scanning for) these networks and signals so that it cannot triangulate. My phones battery saver mode and ultra battery modes do this. Otherwise I have to turn off location services, WiFi, Bluetooth, etc. And then why is my phone even on?
Treat your phone like your little spy that you take everywhere with you. Assume it's always listening and always ratting you out. Operate accordingly.