The different types of skippable ads.

| Enums ||
|---|---|
| `SKIPPABLE_AD_TYPE_UNSPECIFIED` | Default value. This value is unused. |
| `ANY` | Any skippable or not skippable. This is only for programmatic case when the creative skippability is decided by the buyside. |
| `DISABLED` | The ad is not skippable. |
| `ENABLED` | The ad is skippable. |
| `INSTREAM_SELECT` | The ad is an instream select ad. |