" You “burn” your way into the mind by narrowing the focus to a single word or concept. It’s the ultimate marketing sacrifice. Federal Express was able to put the word overnight into the minds of its prospects because it sacrificed its product line and focused on overnight package delivery only. In a way, the law of leadership—it’s better to be first than to be better—enables the first brand or company to own a word in the mind of the prospect. But the word the leader owns is so simple that it’s invisible. The leader owns the word that stands for the category. For example, IBM owns computer. This is another way of saying that the brand becomes a generic name for the category. “We need an IBM machine.” Is there any doubt that a computer is being requested? You can also test the validity of a leadership claim by a word association test. If the given words are computer, copier, chocolate bar, and cola, the four most associated words are IBM, Xerox, Hershey’s, and Coke. An astute leader will go one step further to solidify its position. Heinz owns the word ketchup. But Heinz went on to isolate the most important ketchup attribute. “Slowest ketchup in the West” is how the company "

― Al Ries , The 22 Immutable Laws of Marketing: Violate Them at Your Own Risk