SHOPPING_PERFORMANCE_REPORT.OfferId contains "--" in some reporting entries

[Manuel Rodriguez Guimérans]

Hello,

I've noticed that in the SHOPPING_PERFORMANCE_REPORT some (not many) impressions are not being allocated to any OfferId (a.k.a. Item Id). I.e., the OfferId and ProductTitle attributes in the report contain "--". What's odd is that none of the description of both attributes explicitly mentions "--" as a possible value (other attributes do, like AverageCPC, for example). Also, those "--" OfferId values are only returned from the AdWords API for reporting data from 2020-06-25 on. Is this a bug or should we assume OfferId="--" as a legit value?

Here an example query and result:

SELECT
  Device,
  OfferId,
  ProductTitle,
  Impressions,
  Clicks
FROM SHOPPING_PERFORMANCE_REPORT
DURING 20200625,20200625

Device                                  Item Id Product Title   Impressions     Clicks
Mobile devices with full browsers       --      --              6               0    
Tablets with full browsers              --      --              61              0    

# I'm omitting almost 40k rows where Item Id != '--', totalling ~4M impressions

Thanks in advance and regards,
Manu

[Google Ads API Forum Advisor Prod]

Hi Manu,

Thanks for reaching out. With regards to your concern,  Can you please provide the customer id and screenshot of the UI, so I can further investigate the issue. please reply privately to author options while sharing the details.

Thanks,
Nirmita Patel Google Ads Team

ref:_00D1U1174p._5004Q21jKAh:ref

[Manuel Rodriguez Guimérans]

Replied privately with additional information. Thanks.

[Google Ads API Forum Advisor Prod]

Hi Manuel,

Thank you for providing the information. I have run the report using your account in the AdWords API as well  UI  and the values returned as expected. Can you please try to run report again. If you are still facing any issue, could you please send the complete request and response logs for me to further investigate. Please reply privately to the author option.