Hey everyone iwas just wondering ow in app ads exactly work? I was watching my gf plying on her phone and 2 ds popped up.One of tem was a room/Flat searching app(Were currently looking for a new flat),and the other one was adating app.Does this mean she has a dating app on her phone? Its an android phone,she also uses fingerprint for protection (Its her work phone) Any help would be appreciated .