The invention is a digital information display system (10), comprised of an electronically controlled display (20), usually used to display advertising, A video camera (30) is used to detect one or more viewers in the audience who are paying attention (100) to the display (20), and if so which part of the display (30). Based on which part of the display has the viewers attention, the advertising displayed is adjusted in real-time and based on the viewer analysis to promote continued attention from the viewer. It is an advantage of the invention that the display is able to continuously present relevant advertising content, and with reduced delay, to an audience by using its passive observation and analysis capabilities.