Enum describing the different channel subtypes.
| Enums | |
|---|---|
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                Not specified. | 
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                Used as a return value only. Represents value unknown in this version. | 
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                Mobile app campaigns for Search. | 
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                Mobile app campaigns for Display. | 
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                AdWords express campaigns for search. | 
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                AdWords Express campaigns for display. | 
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                Smart Shopping campaigns. | 
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                Gmail Ad campaigns. | 
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                Smart display campaigns. New campaigns of this sub type cannot be created. | 
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                Video TrueView for Action campaigns. | 
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                Video campaigns with non-skippable video ads. | 
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                App Campaign that lets you easily promote your Android or iOS app across Google's top properties including Search, Play, YouTube, and the Google Display Network. | 
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                App Campaign for engagement, focused on driving re-engagement with the app across several of Google's top properties including Search, YouTube, and the Google Display Network. | 
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                Campaigns specialized for local advertising. | 
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                Shopping Comparison Listing campaigns. | 
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                Standard Smart campaigns. | 
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                Video campaigns with sequence video ads. | 
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                App Campaign for pre registration, specialized for advertising mobile app pre-registration, that targets multiple advertising channels across Google Play, YouTube and Display Network. See https://support.google.com/google-ads/answer/9441344 to learn more. | 
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                Video reach campaign with Target Frequency bidding strategy. | 
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                Travel Activities campaigns. | 
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                YouTube Audio campaigns. |