AI-generated Key Takeaways
- 
          The expansion level determines the size of the lookalike audience. 
- 
          NARROWexpansion targets a small group of similar users.
- 
          BALANCEDexpansion targets a medium group, includingNARROWusers.
- 
          BROADexpansion targets a large group, including all users fromBALANCED.
Expansion level, reflecting the size of the lookalike audience
| Enums | |
|---|---|
| 
 | Not specified. | 
| 
 | Invalid expansion level. | 
| 
 | Expansion to a small set of users that are similar to the seed lists | 
| 
 | Expansion to a medium set of users that are similar to the seed lists. Includes all users of EXPANSION_LEVEL_NARROW, and more. | 
| 
 | Expansion to a large set of users that are similar to the seed lists. Includes all users of EXPANSION_LEVEL_BALANCED, and more. |