AI-generated Key Takeaways
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A carrier criterion is used for campaign targeting.
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It has fields like resource name, ID, name, and country code.
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Resource names are in the format
carrierConstants/{criterion_id}. - 
          
ID, name, and country code are output only fields.
 
A carrier criterion that can be used in campaign targeting.
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 Output only. The resource name of the carrier criterion. Carrier criterion resource names have the form: 
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 Output only. The ID of the carrier criterion.  | 
              
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 Output only. The full name of the carrier in English.  | 
              
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 Output only. The country code of the country where the carrier is located, for example, "AR", "FR", etc.  |