"Ogilvy on Advertising" is a book by David Ogilvy, a pioneer in the field of advertising, who shares his insights and experiences from a long and successful career. The book covers a wide range of topics, including how to create effective advertising campaigns, the different roles within an agency, and the importance of research in making informed decisions. It also explains Ogilvy's approach to working with clients, emphasizing the need to understand their products and build strong relationships. The book is a valuable resource for anyone interested in the history and practice of advertising.