Content targeted popunders are when you use contextual popunder ads that are placed with content networks. They have a good click through rates and are considered to be affordable and effective as well. In this kind of campaign, you need to get your popunder ads designed and then the ad serving places it with a content network that has a similar theme or same keywords. For instance, if your website is about fashion and lifestyle then your popunder ads are linked with ad network that talk about fashion and lifestyle. The people who visit the content site and read it notice your content targeted popunder ad when they close the window. Since it is related to what the user is looking for, he is likely to click on the ad and is directed to your website. This helps you to get the right traffic at your site and these people are likely to be interested in your products and services.
You can get the popunder ads designed by a good online media company that can recognize the right keywords and use it for promoting your website. They place it with right content network so that you are able to get quality traffic and popularize your website.