There is no such thing as a good or bad ad in isolation. What is good at one moment is bad at another. Research can trap you into the past.
William BernbachThere are a lot of great technicians in advertising. And unfortunately they talk the best game. They know all the rules. They can tell you that people in an ad will get you greater readership. They can tell you that a sentence should be this short or that long. They can tell you that body copy should be broken up for easier reading. They can give you fact after fact after fact. They are the scientists of advertising. But there's one little rub. Advertising is fundamentally persuasion and persuasion happens to be not a science, but an art.
William BernbachNo matter how skillful you are, you can't invent a product advantage that doesn't exist. And if you do, and it's just a gimmick, it's going to fall apart anyway.
William Bernbach