Characters
Advertising is based on one thing: happiness. And do you know what happiness is? Happiness is the smell of a new car. It’s freedom from fear. It’s a billboard on the side of a road that screams with reassurance that whatever you’re doing is OK. You are OK.
— Don Draper • Mad Men

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker argues that advertising sells one thing, happiness, and defines it through a new car's smell and relief from fear. A roadside billboard becomes a loud comfort telling viewers they are fine as they are. The pitch is persuasive, and quietly manipulative in how it soothes.
Context reviewed