Hello,
Thank you for reaching out. Using the respective get() methods within
CampaignService,
AdGroupService, and
AdService will allow you to retrieve data on Campaign, AdGroup and Ad, respectively. You will be able to filter your requests by id by using
Google Ads Query Language. For sample code on how this can be accomplished, you can refer to the "Basic Operations" section under code samples on
this documentation.
Let me know if you have additional questions or require clarification.
Regards,
Danica, Google Ads API Team

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