Pure manipulation of the mind.
I feel like I lack NOTHING. Things are GREAT. Then I see an ad for something and immediately think "do I need that? It looks good". Now I am conflicted. A moment ago I thought I lacked nothing but now I am beginning to question that premise. That is EXACTLY what the advertisers want you to do. And they spend big bucks to design the ad in a way that draws you in and convinces you that your life would be MUCH BETTER with this product or service,