This document provides an overview of different types of advertising, including their definitions and key benefits. It discusses outdoor, indoor, non-product, television, celebrity, public service, covert, retail, surrogate, and classified advertising. The largest advertising agency is JWT, formed in 1864 in New York with over 10,000 employees worldwide and 1,200 clients. Outdoor advertising is effective with 24/7 visibility at a lower cost than TV, newspapers, and radio. Indoor advertising allows targeted messaging. Non-product advertising promotes issues rather than products.