How to interpret the numbers in the "Performance reports" - AdMob network vs. mediation

[Thomas]

Hello,

I'm using AdMob Mediation for one of my Apps, currently with 2 ad networks (iAd and Admob) configured.

I don't understand why I see a big difference in the number of impressions between the "AdMob Network Report" and the "Ad Mediation Report" (#Impression on "AdMob network" being twice as much as #Impressions on "Mediation report")

What do both of these reports show, and why is there a difference? 

Thanks,

Thomas

[Amy Quispe (AdMob SDK Team)]

Hi Thomas,

Are your users in an area with poor internet connectivity? It might be that the ad isn't loading quickly enough.

Amy Quispe

[Thomas]

Hello Amy,

I don't think that is the problem, since the number of requests also differs by about the same factor. 

The number of requests reported in the "AdMob Network report" is twice the amount of the requests in the "AdMob Mediation Report".

Any other idea what would be the cause? Thanks for your help.

Best,

Thomas

[Amy Quispe (AdMob SDK Team)]

Hi Thomas,

We're looking into this on our end to see if we have any reporting problems.

Amy Quispe

[Thomas]

Thanks Amy, let me know if you found something.

Cheers,

Thomas

[The Sheridan Group - Tech Lab]

Hi Amy,

Could you also reply to Thomas' second question: "What do both of these reports show, and why is there a difference?"  Or assuming that there is SUPPOSED to be a difference, what is that difference based on?  I am seeing the opposite issue from Thomas, where the impressions in the Ad Mediation report are far greater than in the Ad Network report.  

In previous threads Eric Leichtenschlag commented that the Ad Mediation report shows raw numbers based on the number of times a request is processed through the mediation adapter.  In my particular case, we are using the mobile SDK.  Our clients' AdMob accounts are solely used for mobile apps that only serve House Ads through AdMob.  We don't enable any mediated networks.  So I don't understand why any data would be reported on the Ad Mediation report at all.  Could you kindly provide definitions for these two reports?  (I've dug through the help and past posts but have not found clear written definitions for the elements of these reports.)

Thank you,

Alicia

[Dan Pavel]

It to bad the discution didn't continue. it would have been interesting to finally find out what is wrong with the mediation tool!

[Eric Leichtenschlag]

Try to think of "Mediation" and "AdMob Network" as two separate libraries compiled into the same binary.

In the new UI, House ads are treated as a mediation line item. So house ads stats show up in the mediation report. If you have more than one line item on your ad unit, you are essentially using mediation.

Mediation uses a waterfall model. The request goes to the first line item, which logs a mediation request. If it fills, a mediation impression is recorded on that line item. If it doesn't fill, the next network gets a request and a chance to get an impression.

If that mediation line item happens to be AdMob network, request/impressions will also get reported in AdMob network report.

In Thomas's case, his ad unit was migrated from the legacy UI, and has a legacy publisher ID, and a legacy mediation ID associated with his ad unit. @Thomas, did you ever release your app with a publisher ID integrated (not a mediation ID)? If so, than any users who didn't update your app that uses the legacy mediation ID could be generating requests associated with your new AdMob ad unit, but not going through the mediation flow. Therefore, stats could theoretically show up on AdMob report but not through mediation.