a method for delivering advertising information from a server site to a client . the including steps of 1 ) maintaining an advertising data base comprising advertising records , each advertising record being associated with at least one item and / or category ; 2 ) generating an item list containing at least one item to be acquired by the client ; 3 ) retrieving , from the advertising data base , at least one advertising record which is associated with at least one item contained in the item list or a category of the item ; and 4 ) using the retrieved advertising record for delivering advertising information from the server site to the client .