Here is an example that just happened today. I talked to my partner about me going to a city directly (via one state) or indirectly (via another state). All I said was "so you want me to go directly to X".
Boom, Illinois tourism ad shows up the next time I hit the internet. Scary thing is I didn't even say the state name, just the destination, and SOMETHING calculated that Illinois is in the middle.
This stuff has now happened far too many times in the last 10 years of my life, it is simply implausible to call it coincidence at this point. You are being listened to by your phone.
Ad firms have no ethical boundaries, and have lied about their data collection over and over.
What is really frightening is that if the ad companies know everything about you, then multiple state actors also know everything about you.
> You are being listened to by your phone.
This would simply eat the battery immediately, it's simply not feasible and given all the other, cheap tracking it wouldn't even be beneficial.
Why would that be even be a good targeted ad? Its simpler and more profitable to show you ads about a place you actually plan to go to..