[jfuhrman]

Google uses Android phones GPS location to track people's store visits.

http://digiday.com/platforms/google-tracking/

http://www.datadrivenbusiness.com/google-quietly-testing-off...

If you turn it off, things like Google Now stop working.

[phatfish]

Yep, im pretty sure just the mac address collection from wifi radios would be enough to track what store you have been in if you run an Android phone.

I have wifi and gps turned off except when i am lost.