Solution:Established in 1869, N.W. Ayer and Son is regarded as the first modern advertising agency created specifically to serve advertisers rather
than newspapers.The agency pioneered many practices of modern advertising, including campaign planning, market research, and creative strategy.
Its innovation shaped the evolution of professional advertising, introducing structured client services and standardized ad creation methods.
N.W. Ayer and Son later became famous for iconic campaigns such as "A Diamond is Forever," influencing advertising worldwide.