Digital signage is a new media concept. It is a multimedia professional audio visual system to publish the business, financial and entertainment information by the large screen terminal display equipment. What’s more, it can be used in shopping mall, supermarket, hotel lobby, restaurant, cinema and other crowded public places.

Furthermore, it aimed at the specific physical location, specific time for a specific group of people to play advertising information, initiating the effect of advertising.

The digital signage share honor with paper media, radio, television and the Internet, called "the fifth media".