Which campaign criterion types allow setting bidModifier?

[Diego Morello]

Hi,

I have done several tests trying to figure out which campaign criterion types support bidModifier, especially for update operations, but I still cannot understand how this feature works. In several cases I have received an error message ("The field is not allowed to be set when the negative field is set to true, e.g. we don\'t allow bids in negative ad group or campaign criteria."), but the API returns that even if we create a biddable (non-negative) campaign criterion with null bidModifier.

I would like to know the following, which apparently the documentation does not explain:

• Which campaign criterion types allow negative or biddable criteria?
  
• Which of them support setting bidModifier on creation?
• Which of them support modifications on bidModifier (upon update operations)?
  

Thanks!

[Google Ads API Forum Advisor]

Hi Diego,

Here's our bid modifier guide,  Ad Group Level Target Overrides guide (slightly different than bid modifiers) and Manage Bid Modifiers guide. A negative criteria means there's no serving, hence no modifying either. Feel free to get back to us with more specificity.

Regards,

Aryeh Google Ads API Team

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