Advertisement delivery capable of providing data to satisfy advertising requests for displaying information to a user accessing an online computer system, generally includes using a first server that is structured and arranged to deliver advertisements to a first region of a display, and a second server that is structured and arranged to deliver advertisements to a second region of a display that is different from the first region. Advertisement delivery may also include a display server that sends input based on demographic data to the servers, where the display server receives instructions from at least one of the first and second servers based on the region controlled by the server, and a configuration system that generates and sends a first configuration file to the first server and a second configuration file to the second server, where the first configuration file includes instructions for displaying advertisements to the first region, and the second configuration file includes instructions for displaying advertisements to the second region.