Industry WIKI

A barker channel is a form of digital signage, operating in the form of a television channel that is entirely composed of sales promotion and advertising, usually marketing various features of the service carrying the channel. The name is derived from the circus barker, who stood outside a circus and shouted to passers-by to encourage them to enter to view the entertainment being provide

Tradio is a type of phone-in radio program formatted to provide a venue for listeners to freely advertise items they have to sell or trade. The concept is analogous to classified ads in local newspapers and most prevalent in the south and midwest. "Tradio" is a portmanteau of "trade" and "radio". The format is also often called Swap Shop; Buy, Sell, or Trade; Biz Baz; or Trading Post.