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How to Choose the Best Ad Format for Your Marketing Goals

Last Updated 22 January 2026
Author Orestis Leventis

Choosing the type of ad to run is perhaps the most important step when it comes to creating a format for the advertising campaign that is most appropriate for the funnel or audience as well as budget that you have. Different types of ads, including popunder ads to native banners to mobile interstitials, are designed to serve a certain purpose.

For a flexible testing and optimizing platform for these formats, TrafficStars has a range of formats that perform very well with analytics, bidding, and traffic from around the world. Regardless of whether you’re running a marketing campaign on a desktop or mobile device, it’s very easy to match the format of the ad with the marketing objectives.

Here are the most common ad types and the platforms they are best suited for:

Popunder Ads

What is a pop-under? It is a type of pop-up advertisement that appears behind the main browser window, and it is visible only when the active tab is closed or minimized by the user. Popunders are considered less intrusive than traditional pop-ups, which is why they are mostly used for generating traffic on a large scale at a relatively lower cost.

Best For:

  • Awareness campaigns
  • Entertainment verticals
  • Adult verticals
  • Offerings for a broad target group

Funnels: Top of Funnel (TOFU), Cold Traffic On TrafficStars, popunder advertising is one of the most successful ad formats due to high volumes, worldwide GEO, and an attractive pricing model on a CPC and CPM basis.

Native Advertising

Native ads are created to resemble the surrounding environment of the content, ensuring a better user experience. They also help in achieving a higher engagement rate and are very effective on both desktop and mobile ad formats.

Best for:

  • Soft conversions (Newsletter sign-ups, Content consumption)
  • Brand awareness
  • Pre-landers and Long Sales Pages

Funnels: Mid-funnel (MOFU) It is also worth mentioning that TrafficStars supports native advertising in various niche categories with the possibility of complex targeting.

Banner Ads

The classic banner type (top, side, or inline) is also widely popular due to the ease of implementation and scalability. Although it is prone to banner blindness, a well-crafted banner will always perform well.

Best for:

  • Retargeting campaigns
  • Promotions or discounts
  • Visual Products and Brands

Funnels: Mid to bottom of funnel Utilize banner ad placements on TrafficStars with frequency capping to avoid banner fatigue and maximize your click-through rates.

Video Ads

Video is an extremely engaging format of ads, which helps build trust, as well as conversions, through story-building. Whether you're launching an in-stream video on a content site or a reward video on a mobile game, video is an extremely effective format, irrespective of the industry you're catering to.

Best for:

  • Product demonstrations and testimonials
  • Emotional hooks and storytelling
  • High-ticket offers

Funnels: From top to bottom of funnel (Depending on video type) TrafficStars also supports both desktop and mobile video ad placements, such as VAST and MP4, which gives you the flexibility you need for your campaign strategy and delivery.

Mobile Interstitial Ad Format

A Mobile Interstitial ad format is a full-screen ad that appears between the transitions of the app’s content, such as levels in a game or app pages. Mobile Interstitial ad formats have been known to have very high visibility and CTR.

Best for:

  • Application installs
  • Lead generation
  • Limited-time offers

Funnels: All funnel stages, based on placement and creative On TrafficStars, interstitials usually have higher eCPMs or engagement rates than smaller units, especially on mobile-heavy niches.

Final Tip

For a determination of the most successful mobile advertising format or desktop advertising campaign format for a given product or audience, testing is a key factor. Using a service such as TrafficStars, it is possible to engage in A/B testing for creatives, adjust bids in real-time, and assess a variety of key performance metrics, such as:

  • Click-through rate (CTR)
  • Conversion rate (CVR)
  • Effective cost per thousand impressions (eCPM)

Thanks to the many advertising formats, precise targeting, and analytics capabilities offered by TrafficStars, you have all the chances you need to sync your advertising goals with your business goals — whether it is traffic, lead generation, or conversion.

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