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I still don’t think companies serve you ads based on spying through your microphone
(simonwillison.net)
This is a most excellent place for technology news and articles.
It displayed the ad before I could get home and research it. It had only been discussed out loud and in person.
There’s always other signs.
Did you connect to the clinic's WiFi?
Just being near their WiFi is enough.
Yes, I was on the wifi before the appointment.
This is why. Not because your phone is listening to you.
The wifi was not related to the medical issues, the symptoms, or the specific clinical term mentioned by the doctor.
But it's reasonable to believe other people would have searched the same topic on that network
Edit: or even that they looked it up o their own network following connecting to the clinic's.