OptionaladIMA's ad id for an ad of a GAM pod, where several creatives play under one asset. Absent otherwise.
OptionalcreativeIMA's creative id for an ad of a GAM pod.
OptionalformatDeclared format of the break's selected variant.
Optionalpod1-based position within the pod as reported at runtime (IMA getAdPodInfo().getAdPosition() / VAST sequence).
Emitted when an individual ad starts playing.