Thank you for your help!
Can I create automated targeting ad group under a display campaign, not under a display smart campaign?
When the automated targeting ad group created manually under a display campaign(not a display smart campaign, the AdvertisingChannelSubType is none when retrieving through API), we can also create other ad groups with specific userlist criterion under the same campaign.
But when I create automated targeting ad group under a display smart campaign through API, I cannot create other ad groups with userlist criterion. And comparing with the automated targeting ad group created manually in Google Adwords UI, there're some differences.
So my questions are when using API:
Can I create automated targeting ad group under a display campaign with setting
ExplorerAutoOptimizerSetting.optin to true, not under a display smart campaign?
If not, can I create none-automated targeting ad group under s display smart campaign?