12 billion. That’s roughly how many monthly popunder impressions run through a network like Adsterra alone. If you’re weighing a popunder ad network against other options for your next campaign, the numbers behind popunder ads are worth a closer look.

How Popunder Ads Actually Work

The ad opens in a new browser tab after a visitor clicks anywhere on the page. It doesn’t cover what they’re reading. It just sits there, waiting, until they close the original tab or switch over. That’s the whole mechanic, and it’s why the format still pulls decent attention without wrecking the user experience the way a hard pop-up does.

Full-screen, high visibility, and priced under either CPM or CPA, depending on what your campaign actually needs.

Why Advertisers Keep Coming Back to This Format

A few reasons popunder ads haven’t disappeared, despite plenty of predictions that they would:

• ROI regularly clears 100%, and some verticals push past 300%
• Massive reach, since popunder inventory spans thousands of publisher sites
• Flexible pricing between CPM and CPA, so you’re not locked into one model
• Fast volume. If a campaign needs impressions quickly, this format delivers them

Verticals Where It Performs Best

Apps tend to convert well, mostly for install-driven campaigns. iGaming and sports offers do especially well around live events and promotional windows. Software and utility offers work because the format gives room to show a free trial or a core feature without much friction. E-commerce sees solid results too, particularly with time-limited or seasonal promotions.

One frequently cited case is a movie-streaming site that reached around $14,000 a month by pairing Popunder with Social Bar, a clear illustration of how the right format mix can move revenue.

Comparing Popunder to Other High-Volume Formats

Format	Visibility	Best Use Case
Popunder	Full-screen, opens after click	Volume-driven campaigns, quick testing
Interstitial	Full-screen, appears over content	High-impact branding, strong CTR
In-Page Push	Notification-style, in-page	Lower friction, mobile-heavy traffic

What to Set Up Before You Buy Popunder Traffic

None of this works well without tracking. Connect a tracker like Voluum, Binom, or Bemob before launch, not after. Start with a modest budget, somewhere around $100 for testing, and scale once the numbers actually hold up rather than assuming they will.

Most popunder ad networks run on a self-service setup, meaning advertisers manage targeting, budgets and bids directly. RTB pricing then handles much of the real-time bidding once the campaign goes live. On a network like Adsterra, that setup comes with more than 20 targeting filters (geo, OS, connection type, carrier, and more), so a popunder campaign can be narrowed to the exact audience an offer needs. And popunder isn’t the only format on the table: the custom Social Bar, a non-intrusive format that’s hit CTRs as high as 33% on some campaigns, is worth testing alongside it for mobile-heavy traffic.

FAQ

What makes a popunder ad network different from a standard display network?

The format itself. Popunder ads open in a background tab instead of sitting directly on the page, which changes both how visible they are and how they’re priced.

Do popunder ads still convert well in 2026?

Yes, particularly in verticals like iGaming, apps, and e-commerce. ROI above 100% isn’t unusual, and some campaigns clear 300%.

What budget is enough to test popunder ads?

$100 is a reasonable starting point for testing a new offer before committing to a larger spend.

Is tracking necessary for popunder campaigns?

Yes, and it’s easy to set up. Connecting a tracker like Voluum, Binom, or Bemob before launch gives you a clear, real-time view of your conversions from day one.

Which pricing model works better, CPM or CPA?

Depends on the goal. CPM suits volume and reach, while CPA ties spend directly to conversions, which matters more for performance-focused campaigns. Self-serve platforms also give advertisers more control over campaign settings, but that does not mean they have to manage everything alone. Adsterra offers support that can advise you if you are unsure about targeting, pricing, or other campaign settings.