AI-generated Key Takeaways
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Enum describes possible customer match upload key types.
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CONTACT_INFOmatches members from customer information like email, phone, or address. - 
          
CRM_IDmatches members from advertiser-generated and assigned user IDs. - 
          
MOBILE_ADVERTISING_IDmatches members from mobile advertising IDs. 
Enum describing possible customer match upload key types.
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                Not specified. | 
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                Used for return value only. Represents value unknown in this version. | 
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                Members are matched from customer info such as email address, phone number or physical address. | 
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                Members are matched from a user id generated and assigned by the advertiser. | 
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                Members are matched from mobile advertising ids. |