Systems, methods and computer program products are provided for selecting an advertising object to be displayed within a Web page requested by a user based on the geographic location of the user and/or on the time of day. Systems, methods and computer program products are provided for validating an offer within an advertising object of a Web page displayed within a Web client in communication with a Web server. Systems, methods and computer program products are also provided for changing content within an object displayed within a Web page based on changes in geographic location of a user. In addition, systems, methods and computer program products are provided for redeeming an electronic coupon stored within a first computing device, wherein the electronic coupon is valid within a designated geographic region and for a designated period of time.