Narrowcasting

nar-oh-kast verb.
1. Convenience Advertising is a method designed to carry focused messages to specific target groups in a highly effective manner. It can be contrasted with mainstream advertising, which uses TV, radio or billboards to display messages, by pointing out that these strategies broadcast while Convenience Advertising narrowcasts.

Dr. Stephen Mugford, Department of Sociology, Australian National University, Canberra, 1991.