Television, radio, magazines, newspapers and direct mail are most frequently used for consumer advertising. There are many good products that compete in a free and open market. Advertising helps bring the manufacturer's message to consumers in hopes of influencing consumer choice. But advertising is not magic. While it is the most effective and least expensive way of telling people about a product, it cannot continue to sell the product to a disappointed consumer.
Manufacturers know very well that consumers can switch brands very easily.
Without repeat sales, a company stands to lose millions of dollars. Adversing helps lower prices. Since advertising can help build consumer demand, manufactuers can sell higher quantities of product. In this way companies can produce more with a lower production per unit. To remain competitive, companies need to sell products at a price consumers are willing to pay.