The CEO of Instagram has shed light on why its ads can be so spot on -- and it's not from spying, because it doesn't need to.

Finally, Mosseri says, not every ad appears after you start talking about it. "You might have actually seen that ad before you had the conversation and not realized it… We scroll by ads quickly, and ...

The belief that smartphones surreptitiously listen to our spoken conversations to serve us targeted ads has been around almost as long as modern handsets; most people ...