AI-generated Key Takeaways
- 
          The content describes an enum with possible custom audience types. 
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          Custom audience types include options like UNSPECIFIED, UNKNOWN, AUTO, INTEREST, PURCHASE_INTENT, and SEARCH. 
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          Each enum value corresponds to a specific method for matching users for advertising purposes. 
Enum containing possible custom audience types.
| Enums | |
|---|---|
| 
 | Not specified. | 
| 
 | Used for return value only. Represents value unknown in this version. | 
| 
 | Google Ads will auto-select the best interpretation at serving time. | 
| 
 | Matches users by their interests. | 
| 
 | Matches users by topics they are researching or products they are considering for purchase. | 
| 
 | Matches users by what they searched on Google Search. |