What is Pop-under?
Pop-under is a type of advertisement that opens in a new browser window or tab behind the current page. Unlike pop-up ads, which appear on top of the active page and are often considered intrusive, pop-unders are less obtrusive as they wait for users to close their current browsing session before displaying.
This form of advertising has been around for years and continues to be popular with advertisers because it can generate high click-through rates without disrupting the user experience. When done correctly, pop-unders can be an effective way to reach a targeted audience and increase conversions.
If you've ever opened up your browser after closing all tabs only to find another ad waiting for you, then you've likely encountered a pop-under ad.