Final answer:
A Bid Modifier is used to adjust fixed bids for different geographies or device types, allowing for bid adjustments based on context like location or device type.
Step-by-step explanation:
To adjust fixed bids for different geographies or device types, the feature you would use is a) Bid Modifier. Bid Modifiers allow you to increase or decrease your bids in certain contexts, such as geographic location or the type of device being used to search.
For example, if you want to bid more on searches coming from mobile devices, you can set a positive bid modifier for mobile. Similarly, you can adjust bids for different locations if you've identified performance variations based on geography.
The feature that you can use to adjust fixed bids for different geographies or device types is Bid Modifier.
Bid Modifier allows you to increase or decrease your bids based on specific criteria, such as location or device type. For example, if you want to bid higher for users in a certain region or on a particular device, you can use bid modifiers to adjust your bids accordingly.
By using bid modifiers, you can optimize your advertising campaigns to target specific geographies or device types more effectively, maximizing your reach and performance.