Corporate identity many times is conveyed exclusively through graphic design. A company's logo frequently being not only its identifying symbol, but the customer's sole source of information about the nature of who and what the company represents. For this reason it is in the best interest of any company to pay very strict attention to the use of graphic design in its printed materials. Advertising The power of advertising is undeniable. If advertising didn't work so well there wouldn't be so much of it about.
Businesses use it because it DOES work.
Most advertising is comprised of the simple conveyance of information about a company's products or services. Therefore, the key purpose of advertising is to bring consumers that awareness. Many advertisers go to extreme measures to get their message across, bludgeoning consumers with flash and hype in order to get their attention. This is mostly unnecessary. With some products, perhaps, because of the nature of their appeal and the fierce competition inherent in their particular market, it might be, but with most products, it isn't.