how come i read books and then get advertisements related?

[vermillioncorefan]

i went and bought Karl Marx at a physical store and now i’m getting these weirdly political ads on youtube

 

[Vermilioncore]

same one time I bought duct tape from a store and got ads about attorneys

 

[Gonthar]

i went and bought Karl Marx at a physical store and now i’m getting these weirdly political ads on youtube

Where, on your phone?
It very likely spies on you - through the microphone and camera, hears what you talk about, where you go, it identifies what you buy, then shows the appropriate ads.