AI-generated Key Takeaways
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Campaign bid modifiers allow for bid adjustments at the campaign level for specific criteria.
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Key fields include
resource_name,campaign,criterion_id, andbid_modifier. - 
          
The
criterionfield is a union field that can specify the type of criterion being modified, such asinteraction_type. - 
          
The resource name uniquely identifies the campaign bid modifier using the customer ID, campaign ID, and criterion ID.
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The
bid_modifierfield is a double representing the factor by which the bid is adjusted when the criterion matches. 
Represents a bid-modifiable only criterion at the campaign level.
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 Immutable. The resource name of the campaign bid modifier. Campaign bid modifier resource names have the form: 
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 Output only. The campaign to which this criterion belongs.  | 
              
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 Output only. The ID of the criterion to bid modify. This field is ignored for mutates.  | 
              
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 The modifier for the bid when the criterion matches.  | 
              
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                   Immutable. Criterion for interaction type. Only supported for search campaigns.  |