Targeted television advertisements associated with online users' preferred television programs or channels

In an automatic, computer-implemented method, a selected television advertisement is presented automatically in association with a television program or channel, which in turn is selected based at least in part on information from an online user profile that contains information indicating a user's preference for that television program or channel. The television advertisement is selected based at least in part on additional information from the online user profile that is unrelated to the selected television program or channel. The selected television advertisement is presented on or during the selected television program or channel via a set-top box, which has a set-top box identifier associated with the online user profile.