Pop-unders are another form of online advertising on the Internet which emerged from the concept of pop-ups. This form of advertising is mostly acceptable by all advertisers, publishers and users as they are less intrusive and do not interrupt the user immediately nor take the user away from the publisher site. It gives advertisers a good opportunity to brand their product as well as giving the users sufficient product information. It can also provide advertisers with no creatives to use any page within their website as a pop-under advertisement .
When a user visits a website with pop-under advertisements, the pop-under will open up in a new browser window hidden under the user’s current browser. When the user closes their current browser then they will noticed the pop-under advertisement making them less intrusive, more acceptable to users and will not take visitors away from the publisher’s website.