I learned Stealth marketing. I was surprised with this advertising.
For example you might be in a café or a pub and you hear people talking about something, maybe it’s a new mobile phone or a new service of some kind. You think they are ordinary people so you might consider that what they are recommending to each other is an honest source of information. But, you could be wrong. Stealth marketing companies employ actors to go to places where people are and they act out a script which involves talking about particular products or services.
menhir
That's an interesting one. It would be difficult to know if you had been subliminally 'sold' something by these sorts of stealth means. It is a good reason not to listen in to other people's conversations, particularly if the conversation is about material services or goods!!