On the average, five times as many people read the headline as read the body copy. When you have written your headline, you have spent eighty cents out of your dollar.
David Ogilvy...consumers do not buy one brand of soap, or coffee, or detergent. They have a repertory of four or five brands, and move from one to another. They almost never buy a brand which has not been admitted to their repertory during its first year on the market.
David Ogilvy