AI-generated Key Takeaways
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Campaign bid modifiers can be created, removed, or updated with a single operation.
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An
update_maskis used to specify which fields are modified during an update operation. - 
          
The
operationfield is a union field that determines the type of mutate operation (create, update, or remove). - 
          
Create operations do not require a resource name, while update and remove operations expect a valid resource name.
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Remove operations require a resource name in the format
customers/{customer_id}/CampaignBidModifiers/{campaign_id}~{criterion_id}. 
A single operation (create, remove, update) on a campaign bid modifier.
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                   FieldMask that determines which resource fields are modified in an update.  | 
              
Union field 
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                   Create operation: No resource name is expected for the new campaign bid modifier.  | 
              
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                   Update operation: The campaign bid modifier is expected to have a valid resource name.  | 
              
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 Remove operation: A resource name for the removed campaign bid modifier is expected, in this format: 
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