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Bid modifiers

Bid modifiers allow you to adjust bids for a specific criterion without changing the targeting of your campaign or ad group. For example, an ad group bid modifier for mobile devices will not exclude impressions for other types of devices, but it will allow you to raise or lower your bids for mobile impressions.

For more information on how bidding works and how to set bid modifiers, see our Bidding Guide.

Campaign bid modifiers

You can specify bid modifiers at the campaign level for the following criteria type using the CampaignBidModifierService.

InteractionTypeInfo
Define InteractionTypeInfo criteria using one of the predefined InteractionType enums. Currently, CALL is the only supported enum value for campaign bid modifiers.

Ad group bid modifiers

You can specify bid modifiers at the ad group level for the following criteria type using the AdGroupBidModifierService.

DeviceInfo
Define DeviceInfo criteria using one of the predefined Device enums.
PreferredContentInfo
Define PreferredContentInfo criteria using one of the predefined PreferredContentType enums.
Various Hotel Ads criteria
Check out the Hotel Ads bid modifier guide for more details.