Performance Max Campaign Impression total lower than its Listing Group total

[Alex Lee]

Hello,

I have found on several occasions that the total impressions for a performance max campaign ends up being lower than the total impressions of it's listing groups. I can't understand how that could be since the listing groups are lower parts that make up the PMAX campaign. Please see screen shots below.

Performance Max Campaign Impressions Total: 

545,203

Listing Group Impression Total (sum of the two listing groups in this campaign): 1,543,460

I'd appreciate any insight on how this could be. Thank you!

[Google Ads API Forum Advisor]

Hi Alex,

Thank you for reaching out to us.

Please note that our team can only provide support and assistance for Google Ads API-related concerns and technical implementations. The data accumulation is more product-related. That being said, if you want further insights into why the performance max campaign ends up being lower than the total impressions of its listing groups, then I would suggest you reach out instead to the product team via this link, as they are the appropriate team to provide guidance on this matter.

• Google Ads API: https://developers.google.com/google-ads/api/docs/start?hl=en
• link: https://support.google.com/google-ads/gethelp

Best regards,

Google Ads API Team

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