I traveled to Montana this weekend, and took some photos of an ice fishing hut with my iPhone. Today, there was an Amazon ad for an ice fishing shelter in my Facebook feed. I’ve never searched for anything fishing related on Amazon, or Facebook or Google for that matter. I didn’t upload the photo to any site. I live in a southern state unsuited for ice fishing. I did show the pic to my spouse, and said that it was an ice fishing tent. Alexa is installed on my phone. Could be a coincidence, but seems odd. I thought that level of monitoring (photo, voice) was unlikely. Is it?
Even though there is no service, iPhones saves the location of the picture where it was taken. If you open photos and see the details of that you will get to know.
Does not happen in Facebook and it's impossible to do it in WhatsApp. Source: The entire codebase is open to employees and I wanted to know these answers myself when I first got in
May be your location was on and they may be suggesting based on the location
There was no service at that lake.
iPhones record GPS location as metadata when you take pictures. Assuming Facebook has access to your camera roll it can probably get that metadata