Easy Steps: Setting Up a 100% Fill Ad Network Behind Ad Exchange

Ad Optimization
Last updated: June 1, 2026 | by Pierre Kazanowski

Ad Exchange is known to have the best fill rate among all ad networks. However, in the bidding process, Ad Exchange may sometimes be unable to win the battle, meaning you’ll need a backup for an ad impression to target. This strategy allows publishers to monetize every single ad impression possible without having to worry about gaps.

Some of the ad networks known to fill at 100% across all geo-targets are:

  1. WebMedia (all those that are using AppNexus platform)
  2. OpenX
  3. Media.net
  4. AdKarma

We recommend using CoffeeCup FTP to set up a passback URL. Its interface is fairly easy to navigate — you can check out How to Create Passback URLs With CoffeeCup: 10 Simple Steps for a quick guide.

  1. Login to Ad Exchange
  2. Go to ‘Rules’
  3. Give it a descriptive name (e.g. domain_728x90)
  4. Target the relevant ad unit(s)
  5. Look for the section where it says ‘Backup ads’, and choose ‘Show other ads from another URL’
  6. Paste the passback URL in the box box provided

Easy Steps: Setting Up a 100% Fill Ad Network Behind Ad Exchange MonitizeMore

7. Save

Related Read: How to Setup Backup Ads for Google AdSense or Ad Exchange

If you need help in setting up backup ads for Adsense or AdExchange, let us do the work for you! Contact us for a free consultation to find out more.

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