This document provides an overview of advertising, including its history, types, agencies, and media. It discusses how advertising has been used since 4000 BC in rock paintings and evolved to include print, television, radio, internet and more. Product advertising promotes specific products while business advertising is used more by services. Major advertising agencies and their corporate offices are listed. Different media like direct mail, billboards, television, radio, internet and cinema are explained in terms of their usage and impact. Celebrity endorsements are also covered. Both the merits and demerits of advertising are summarized. Lastly, the document states that advertising plays a vital role in connecting organizations to customers.