AI-generated Key Takeaways
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A single operation can be performed on an ad group criterion, including create, remove, or update.
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An
update_maskuses a FieldMask to specify which resource fields are modified during an update operation. - 
          
exempt_policy_violation_keysallows specifying policy violation keys that should not trigger an error, though violating resources may not serve. - 
          
The
operationunion field determines the type of mutate operation being performed on the ad group criterion. - 
          
Each operation type (
create,update,remove) requires specific information, such as a resource name for update and remove, but not for create. 
A single operation (create, remove, update) on an ad group criterion.
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                   FieldMask that determines which resource fields are modified in an update.  | 
              
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                   The list of policy violation keys that should not cause a PolicyViolationError to be reported. Not all policy violations are exemptable, refer to the is_exemptible field in the returned PolicyViolationError. Resources violating these polices will be saved, but will not be eligible to serve. They may begin serving at a later time due to a change in policies, re-review of the resource, or a change in advertiser certificates.  | 
              
Union field 
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                   Create operation: No resource name is expected for the new criterion.  | 
              
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                   Update operation: The criterion is expected to have a valid resource name.  | 
              
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 Remove operation: A resource name for the removed criterion is expected, in this format: 
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