AI-generated Key Takeaways
- 
          Display & Video 360 API v3 has sunset and users should use v4 instead. 
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          The content outlines possible viewability targeting options. 
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          Viewability targeting allows bidding on impressions based on their likelihood of being viewable, from 10% to 90% or more. 
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          VIEWABILITY_UNSPECIFIEDis a placeholder and not a real viewability option.
Possible viewability targeting options.
| Enums | |
|---|---|
| VIEWABILITY_UNSPECIFIED | Default value when viewability is not specified in this version. This enum is a placeholder for default value and does not represent a real viewability option. | 
| VIEWABILITY_10_PERCENT_OR_MORE | Bid only on impressions that are at least 10% likely to be viewable. | 
| VIEWABILITY_20_PERCENT_OR_MORE | Bid only on impressions that are at least 20% likely to be viewable. | 
| VIEWABILITY_30_PERCENT_OR_MORE | Bid only on impressions that are at least 30% likely to be viewable. | 
| VIEWABILITY_40_PERCENT_OR_MORE | Bid only on impressions that are at least 40% likely to be viewable. | 
| VIEWABILITY_50_PERCENT_OR_MORE | Bid only on impressions that are at least 50% likely to be viewable. | 
| VIEWABILITY_60_PERCENT_OR_MORE | Bid only on impressions that are at least 60% likely to be viewable. | 
| VIEWABILITY_70_PERCENT_OR_MORE | Bid only on impressions that are at least 70% likely to be viewable. | 
| VIEWABILITY_80_PERCENT_OR_MORE | Bid only on impressions that are at least 80% likely to be viewable. | 
| VIEWABILITY_90_PERCENT_OR_MORE | Bid only on impressions that are at least 90% likely to be viewable. |