AI-generated Key Takeaways
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          The Ad Group Bid Modifier represents a modification to bids within an ad group. 
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          Key fields include resource name, bid modifier source, ad group, criterion ID, and the bid modifier value itself. 
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          The criterionfield, which specifies what the bid modifier applies to, can include various hotel-related criteria, device type, and more.
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          The bid modifier value ranges from 0.1 to 10.0, with a specific range for PreferredContent and 0 to opt out of a Device type. 
Represents an ad group bid modifier.
| Fields | |
|---|---|
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 Immutable. The resource name of the ad group bid modifier. Ad group bid modifier resource names have the form: 
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 | Output only. Bid modifier source. | 
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 Immutable. The ad group 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. The modifier must be in the range: 0.1 - 10.0. The range is 1.0 - 6.0 for PreferredContent. Use 0 to opt out of a Device type. | 
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 Output only. The base ad group from which this draft/trial adgroup bid modifier was created. If ad_group is a base ad group then this field will be equal to ad_group. If the ad group was created in the draft or trial and has no corresponding base ad group, then this field will be null. This field is readonly. | 
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 | Immutable. Criterion for hotel date selection (default dates versus user selected). | 
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 | Immutable. Criterion for number of days prior to the stay the booking is being made. | 
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 | Immutable. Criterion for length of hotel stay in nights. | 
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 | Immutable. Criterion for day of the week the booking is for. | 
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 | Immutable. A device criterion. | 
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 | Immutable. Criterion for a hotel check-in date range. |