That&#x27;s simply down to proximity. Facebook, like Google, can tell based on your GPS where &quot;home&quot; is (where your phone spends the night, basically) and it knows the same about your neighbors. Your smartphone is a funnel for detailed information about you to whatever apps you install on it, especially social and communication apps.<p>Google in particular creeped me out with this kind of &quot;feature&quot;. A few years ago when I still used an Android phone, I changed jobs but didn&#x27;t change the information in any of my social media profiles, nor in my contact card on the phone itself. After a few weeks, Google Now started giving me drive times to work at the new work address instead of the old one.