Search Impression Share mathematically wrong

[beter...@gmail.com]

I am getting paradoxical Search Impression Share results, both using the API and the UI when querying Search Impression Share broken down by campaign versus not broken down by campaign.

One of my campaigns is showing "<10%" with  2,769 impressions.

That means that the total universe of possible impressions of this campaign is between

27,690 (in case it is the maximum, 10%)

and

276,900 (in case it is the minimum, 1%, or even a bigger universe (ex: 0.01%), making it even more paradoxical)

All other campaigns show precise Search Impression Share numbers, making it possible to infer the exact universe of possible impressions of all of them.

With those numbers we can see that:

1 - If the account total is correct, the "<10%" campaign is wrong. Should be 23%

2 - If the  "<10%" campaign is correct (between 1 and 10%), the account total is wrong. Should be between 22% and 57% - It shows 63.67%

This is a very specific case that seems to be an outlier.

All the campaigns are Search Campaigns inside the Google Network (no partners).

Results for August, 01, 2021 
Filter: "Campaign name does not contain "dsa""
Account: cpd_br_oap_goog_neoperformance_search_brs_noecom_elseve
Account id: 741-200-1528

I am attaching an image (dots and commas follow the international standard) and an excel sheet with all the calculations.

This is a key metric for our clients, please advise.

[beter...@gmail.com]

Adding screenshot from the UI:

First, the account total, not broken down by campaign.

And here broken down by campaign:

[Google Ads API Forum Advisor]

Hi,

I replicated your issue in the UI, the higher the number of 'total universe of possible impressions' there is the lower the percentage on aggregate should be, and the percentage is too high based on the minimum case of having  27690 impressions. 

The Ads API attempts to provide the functionality that is presented in the UI, if the UI has an issue then the API will also have the same issue. I can only suggest you bring this to product support to resolve this.

Regards,

Aryeh Baker Google Ads API Team

ref:_00D1U1174p._5004Q2Lo5Vv:ref

[beter...@gmail.com]

Tks Aryeh.

I´ve opened a case with product support. I Will post here the final resolutions.

Regards