DocumentationAnalyticsStreaming media services guide

Ad starts

Last update: May 15, 2026

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The Ad starts metric counts every ad that began playing during a session. Pair it with Ad completes to compute the ad completion rate, and with Ad count for the equivalent session-level rollup.

How this metric is calculated

The media backend sets mediaReporting.advertisingDetails.isStarted = true when a ad start event is received. The metric is reported on the ad start call.

Reporting system
Source
Adobe Analytics
Automatically collected from context data a.media.ad.view when Media Ads is enabled.
Customer Journey Analytics
mediaReporting.advertisingDetails.isStarted
Data feeds
event_list, post_event_list (see event.tsv lookup)
Audience Manager
c_contextdata.a.media.ad.view
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