The motive behind hiring an advertising agency chicago is to support and promote a product or service and improve its public image in front of the targeted audiences. No matter the advertising agencies in Chicago are small or large; the only function of the advertising agency is to promote the product. Hiring an advertising agency becomes successful not only when people remember their ads but also when people realize the need to buy the product or service so that they can benefit or have satisfaction from the product that the ads shows them.