The nth post on how our phones are spying on us

I know, this topic has been discussed countless times here. Yesterday I conducted a little experiment with my brother: we grabbed a random book, opened it to a page, and picked a ridiculously specific topic to discuss—let's say "the mysterious world of quantum entanglement".
We talked about it loudly for about five minutes, repeatedly mentioning the subject over and over.

Fast forward a few hours, I found myself scrolling through Instagram when, lo and behold, there it was—a targeted ad …

book discuss phones privacy quantum quantum entanglement random spying world