Hi Tung, Thank you for raising your concern.
Based on our API document and product level document, there is no step or process that is discussed about creating ads for Performance Max Campaign. With this, it appears ad is not supported for this type of campaign and this is also the reason why you can't get any data using ad_group_ad. You may confirm this in your UI. Let me know if you have further questions. Regards, Reminder: Share your feedback about the Google Ads (AdWords) API! Take the 2021 Google Ads API and AdWords API Annual Survey Ernie John Blanca Tacata Google Ads API Team ref:_00D1U1174p._5004Q2RwFkd:ref -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog: https://googleadsdeveloper.blogspot.com/ =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API and Google Ads API Forum" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en --- You received this message because you are subscribed to the Google Groups "AdWords API and Google Ads API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/cjLw0000000000000000000000000000000000000000000000R36DGD00FDFNFY1kQ7-bJXVSSXGICA%40sfdc.net.
