AI-generated Key Takeaways
- 
          The user_identifier_sourcefield indicates the source of the user identifier when uploading from specific Google Ads services.
- 
          The identifierunion field must contain exactly one of the listed identifier types.
- 
          Accepted identifier types include hashed email, hashed phone number, mobile ID, third-party user ID, and address information. 
- 
          Different Google Ads services accept different subsets of the available identifier types. 
User identifying information.
| Fields | |
|---|---|
| 
 | Source of the user identifier when the upload is from Store Sales, ConversionUploadService, or ConversionAdjustmentUploadService. | 
| Union field 
 | |
| 
 | 
 Hashed email address using SHA-256 hash function after normalization. Accepted for Customer Match, Store Sales, ConversionUploadService, and ConversionAdjustmentUploadService. | 
| 
 | 
 Hashed phone number using SHA-256 hash function after normalization (E164 standard). Accepted for Customer Match, Store Sales, ConversionUploadService, and ConversionAdjustmentUploadService. | 
| 
 | 
 Mobile device ID (advertising ID/IDFA). Accepted only for Customer Match. | 
| 
 | 
 Advertiser-assigned user ID for Customer Match upload, or third-party-assigned user ID for Store Sales. Accepted only for Customer Match and Store Sales. | 
| 
 | Address information. Accepted only for Customer Match, Store Sales, and ConversionAdjustmentUploadService. |