AI-generated Key Takeaways
- 
          A legacy app install ad is available to a limited number of select customers. 
- 
          This ad type requires specifying the app store, app ID, headline, and two description lines. 
A legacy app install ad that only can be used by a few select customers.
| Fields | |
|---|---|
| 
 | The app store the mobile app is available in. | 
| 
 | 
 The ID of the mobile app. | 
| 
 | 
 The headline of the ad. | 
| 
 | 
 The first description line of the ad. | 
| 
 | 
 The second description line of the ad. |