A method for displaying objects on a timeline area does not lower user retention and can increase the CVR. The present disclosure provides a method for displaying objects on a timeline area, including the steps of an object display device that manages a timeline of communication messages for a user of a Web service determining whether the user has taken an action within a predetermined time period on the timeline area of the Web service, displaying a first object on the timeline area when determining that the user has not taken the action, and displaying a second object that differs from the first object on the timeline area when determining that the user has taken the action.