> How can I stop companies from getting my location data?

The steps they list only cover gps data. In my final year at uni, during the capstone fair, I recall one group built a tracking system that relied on Bluetooth or wifi or something (maybe cellular signals?) to identify and track people indoors. I think they pitched it to be used in malls or airports, but really could work anywhere. It was surprisingly robust.

There are other projects that track you by license plate on highways, or by facial recognition. All this is location data too. I don’t think a highly motivated person could avoid location tracking any more without living in the woods