The present disclosure provides a method and apparatus for detecting significance of promotional information, a device and a computer storage medium. The method comprises: extracting each frame of image in a video segment, taking the image as input of a significance detecting module, and obtaining an output result of the significance detecting model; based on the output result, determining a significance score of promotional information corresponding to said each frame of image; obtaining the significance of promotional information corresponding to the video segment, based on the significance score of promotional information corresponding to each frame of image.