Don't you think it's more likely that they just aren't noticing the ad before it is relevant? I mean, how often do you really notice an ad anyway?
That being said, perhaps the ads are doing their job and planting the idea for that particular product. You then bring it up in conversation or mention it out loud. Then, when you return to facebook later, you see the same ad again and due to it's recent mention, it jumps out at you.
No. We've definitely mentioned out loud things we've never searched for or even entered into a phone or computer, either before or afterwards, and they've shown up in our ads within hours. It's happening at least once a week now. I'm confident it's not any kind of cognitive bias, and that it's just FB spying on us through our mics.
jjeaff didn't say you searched for or entered it into your devices, but that it might have been the devices themselves that first made you think about those topics.
That being said, perhaps the ads are doing their job and planting the idea for that particular product. You then bring it up in conversation or mention it out loud. Then, when you return to facebook later, you see the same ad again and due to it's recent mention, it jumps out at you.
Both seem more plausible.