On television, an infomercial is a short or regular-length television program that combines information presentation with an integrated suggestion to buy a particular product or service.

In the print media, the equivalent to an infomercial is the multi-page "advertising supplement" that is formatted to look like the news part of the medium and contains real information content.

In book publishing, the equivalent is an informative book on any subject that subtly endorses a product or a service.

As books are not normally associated with advertising, the message delivered is even more powerful. This, then is the most sophisticated form of advertising.