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Advertising is a form of communication that typically attempts to persuade potential customers to purchase or to consume more of a particular brand of product or service. “While now central to the contemporary global economy and the reproduction of global production networks, it is only quite recently that advertising has been more than a marginal influence on patterns of sales and production. The formation of modern advertising was intimately bound up with the emergence of new forms of monopoly capitalism around the end of the 19th and beginning of the 20th century as one element in corporate strategies to create, organize and where possible control markets, especially for mass produced consumer goods. Mass production necessitated mass consumption, and this in turn required a certain homogenization of consumer tastes for final products. At its limit, this involved seeking to create ‘world cultural convergence’, to homogenize consumer tastes and engineer a ‘convergence of lifestyle, culture and behaviours among consumer segments across the world’.”

Many advertisements are designed to generate increased consumption of those products and services through the creation and reinvention of the "brand image" . For these purposes, advertisements sometimes embed their persuasive message with factual information. Every major medium is used to deliver these messages, including television, radio, cinema, magazines, newspapers, video games, the Internet, carrier bags and billboards. Advertising is often placed by an advertising agency on behalf of a company or other organization.

Public service advertising
The same advertising techniques used to promote commercial goods and services can be used to inform, educate and motivate the public about non-commercial issues, such as AIDS, political ideology, energy conservation, religious recruitment, and deforestation.

Advertising, in its non-commercial guise, is a powerful educational tool capable of reaching and motivating large audiences. "Advertising justifies its existence when used in the public interest - it is much too powerful a tool to use solely for commercial purposes." - Attributed to Howard Gossage by David Ogilvy.

Public service advertising, non-commercial advertising, public interest advertising, cause marketing, and social marketing are different terms for (or aspects of) the use of sophisticated advertising and marketing communications techniques (generally associated with commercial enterprise) on behalf of non-commercial, public interest issues and initiatives.

In the United States, the granting of television and radio licenses by the FCC is contingent upon the station broadcasting a certain amount of public service advertising. To meet these requirements, many broadcast stations in America air the bulk of their required public service announcements during the late night or early morning when the smallest percentage of viewers are watching, leaving more day and prime time commercial slots available for high-paying advertisers.

Public service advertising reached its height during World Wars I and II under the direction of several governments.