A system to measure effectiveness of displayed content includes a video processing service configured to receive and process a stream of video images captured by one or more video cameras, a display application service configured to produce display content to be displayed on one or more display monitors and to capture user interactions with the displayed content, and a display effectiveness service configured to correlate data received from the video processing service and the display application service and generate a display effectiveness measurement that is a measure of an effectiveness of the displayed content for specific periods of time.