A mobile campaign is a campaign, usually marketing

Marketing

Marketing is the process used to determine what products or services may be of interest to customers, and the strategy to use in sales, communications and business development. It generates the strategy that underlies sales techniques, business communication, and business developments...

, advertising

Advertising

Advertising is a form of communication used to persuade an audience to take some action with respect to products, ideas, or services. Most commonly, the desired result is to drive consumer behavior with respect to a commercial offering, although political and ideological advertising is also common...

, or public relations

Public relations

Public relations is the actions of a corporation, store, government, individual, etc., in promoting goodwill between itself and the public, the community, employees, customers, etc....

-related, through which organizations spam their audience through SMS

SMS

SMS is a form of text messaging communication on phones and mobile phones. The terms SMS or sms may also refer to:- Computer hardware :...

 (text messaging). This form of campaigning allows organizations to reach out and establish relationships with an audience in a more individualized, intimate way.

A good example of one of the first mobile campaigns is the viewer voting system employed in American Idol

American Idol

American Idol, titled American Idol: The Search for a Superstar for the first season, is a reality television singing competition created by Simon Fuller and produced by FremantleMedia North America and 19 Entertainment...

.