Hi Kundan,
Thank you for reaching out. If you are looking for a list of criterion IDs for the affinity categories, you can take a look at
this documentation. For more information on what can be done with audiences via API, I suggest taking a look at
this guide. If you still have any specific questions pertaining to these topics after reading the guide, please let me know.
Regards,
Danica, Google Ads API Team

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