Open Bidding FAQ (Beta)

This feature is currently in beta release.

Below are answers to some of the most frequently asked questions about Open Bidding. 

Set up

I don’t see Open Bidding in my account. How do I get access to Open Bidding?

Open Bidding is currently in closed beta release. Contact your account manager to apply for Open Bidding.

How can I set up a partnership with an Open Bidding ad source? 

To set up a partnership, first ensure that you have an active account with the Open Bidding ad source. In many cases, this is as simple as creating an account on the ad source's home page. Then, add the ad source to a mediation group. 

What third-party ad sources support Open Bidding?

Do I have to create a new mediation group to use Open Bidding?

No. You can add Open Bidding ad sources to existing mediation groups.

What version of the SDK should I use?

To ensure you’re using the correct SDK, follow the instructions on Google Developer for Android and iOS. Instructions are available for each ad source that supports Open Bidding. 

What happens to my existing ad networks if I use Open Bidding?

Existing ad networks are still used in the same way and are ordered in the mediation waterfall according to their eCPM value. The winner of an Open Bidding auction is placed in the mediation waterfall alongside your existing ad networks. The mediation waterfall functions as usual. The highest valued ad source, whether it’s an Open Bidding ad source or not, will get the first opportunity to serve the ad. 

Can I use an ad source as an Open Bidding and a waterfall ad source?

Yes. You can use an ad source as both an Open Bidding and waterfall ad source in the same mediation group. In fact, we always recommend having an ad source in both the waterfall and Open Bidding if possible. The ad source is called in an Open Bidding auction first. If the ad source places a bid, then it isn’t placed in the mediation waterfall a second time because the bid represents what they’re willing to pay. 

However, if the ad source doesn’t place a bid, then it is still called as a waterfall ad source in the mediation waterfall. This gives the ad source a second chance to serve an ad. 

Can I serve ad requests in Russia and China? (Beta) 

You can now send bid requests to Open Bidding ad sources that serve in Russia and China. This feature is in beta.

Creatives will be reviewed with strict, country-specific policies, and blank creatives will not be allowed to serve.

This beta does not currently support ad sources using a custom mobile SDK. Ad sources must be using the Google Mobile Ads SDK.


Can I remove Open Bidding ad sources?

Yes. To remove an Open Bidding ad source from a mediation group:

  1. Click the name of the mediation group where you want to remove the ad source. 
  2. Click the checkbox next to the Open Bidding ad source you want to remove. 
  3. Click Change status
  4. Select Remove.
  5. Click Save

To end your partnership with an Open Bidding ad source, you’ll need to work directly with the ad source. 

How will I receive revenue from Open Bidding ad sources?

Revenue from most Open Bidding ad sources will be paid through AdMob. Some ad sources will pay the Open Bidding revenue to you directly. These ad sources are called direct pay. 

When you add a direct pay ad source in AdMob, you’ll be asked to acknowledge that the ad source will pay you directly. Check your agreement with the direct pay ad source for more details. 

Will Open Bidding increase latency?

No. Open Bidding works on Google data centers, which are generally faster than users’ devices. Open Bidding happens in parallel with the normal processes that return an AdMob ad. 

How can I gauge the performance of Open Bidding?

Use the Open Bidding report. Learn more

How does Open Bidding work with network deals?

Networks that can participate in Open Bidding

The network with whom you have a deal can participate in Open Bidding auctions alongside other ad sources. The highest bid will be placed in the mediation waterfall based on its eCPM value, whether or not it’s the network with whom you have a deal. 

If the network doesn’t place a bid in the Open Bidding auction, it can still be called in the mediation waterfall. If the network places a bid and doesn’t win, it will not be called again in the mediation waterfall. 

Networks that don’t participate in Open Bidding 

The winning bid from an Open Bidding auction is placed in the waterfall according to its eCPM value. If your network deal has a higher eCPM than the winning bid, it will be called first. If the network doesn't have an ad to serve, the ad source with the winning bid will serve the ad.


Why is there a discrepancy between impressions reported in my AdMob account and my third-party ad source accounts?

Due to differences in impression counting standards, and possibly integration variations, small discrepancies may occur. In the case where there are discrepancies, the impressions shown in your AdMob account are used to determine your estimated earnings.

Why is there a discrepancy between earnings reported in my AdMob account and my third-party ad source accounts?

Open Bidding reporting reflects the actual payout to the publisher. Each network may choose to show earnings based on their own contractual terms respectively. Due to these differences in reporting standards, small discrepancies may occur. In the case where there are discrepancies, you should refer to the estimated earnings shown in your AdMob account as the closest to your final payment from Open Bidding networks. 

What do I do when ad sources do not appear to be bidding on my app’s ad requests?

When you see that an ad source is not responding with bids for your inventory, this is a possible indicator of many different issues with serving. It could be that the request lacks the signals acquired via the most current version of the ad source’s client SDK (which must be installed on your app). It can also be that you haven’t installed the latest version of the GMA SDK. Or, it could be due to other reasons that are ad source and configuration specific. 

Check that you are using the latest versions of the ad source’s SDK and the GMA SDK. The Mediation Test Suite can help verify this. An ad source may not bid due to its setup and decisioning, so Google support often does not have insight and may not be able to help troubleshoot these issues. 

If you perceive an issue with a particular ad source, log into your account with that ad source to check for configuration errors and to read troubleshooting documentation.

Why is my fill rate decreasing?

Not every advertising opportunity is the same. Some ad slots have higher user engagement, are more visible, or are more likely to provide the user experience that advertisers are seeking. Therefore, some ad units will generate more revenue per thousand impressions (CPM). 
I'm having trouble with a third-party ad source. What can I do?

If you're having issues with a third-party Open Bidding ad source,  use the following troubleshooting information to contact the ad source directly. 

Ad source Troubleshooting information
Ad Colony For any issues or concerns, please reach out to your AdColony account manager or email
Ad Generation

For issues, contact Ad Generation support at

AppLovin Please reach out to your AppLovin Account Manager or use the AppLovin Support form.
Chocolate Platform For issues, contact Chocolate Platform support at
Facebook Audience Network Visit the Facebook Business Help Center
Fluct For issues, contact Fluct support at
Improve Digital For issues, contact Improve Digital support at
Index Exchange For issues, contact Index Exchange support at For issues, contact support at
Mobfox For issues, contact Mobfox support at
OpenX For issues, contact OpenX support at
PubMatic For issues, contact Customer Success at
Rubicon (Magnite) For issues, contact Magnite support at
Sharethrough For issues, contact Sharethrough support at
Smaato For issues, contact Smaato support at
Smart Ad Server For issues, contact Smart Ad Server support at
Sonobi For issues, contact Sonobi support at
Tapjoy For issues, you can email or
Yieldmo For issues, contact Yieldmo support at
YieldOne For issues, contact YieldOne support at
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