Click-under ads are generally considered more intrusive than push ads. While both forms of advertising aim to capture user attention, click-under ads appear beneath the active browser window and are triggered when a user clicks on a website. They remain hidden until the user minimizes or closes the window, often causing frustration when users unexpectedly discover them. This disrupts the user's browsing experience, leading to a more intrusive feeling. In contrast, push ads typically appear as notifications, but they are easier to dismiss and tend to be less disruptive, especially if the user opts in. Therefore, while both types can be annoying, click-under ads are perceived as more intrusive due to their hidden nature and surprise appearance.