DocumentationAnalyticsStreaming media services guide

Placement ID

Last update: June 8, 2026

CREATED FOR:

  • Developer

This page covers data collection for the Placement ID variable. See Placement ID for the corresponding reporting dimension.

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The placement ID variable identifies the ad placement (typically a slot or zone defined in your ad-server platform).

Property
Value
Context data variable
a.media.ad.placement
XDM collection field
xdm.mediaCollection.advertisingDetails.placementID
Audience Manager trait
c_contextdata.a.media.ad.placement
Required
No
Sent with
Ad start, ad close
Web SDK

Set placementID inside xdm.mediaCollection.advertisingDetails when calling sendEvent:

code language-javascript 
alloy("sendEvent", {
  xdm: {
    eventType: "media.adStart",
    mediaCollection: {
      advertisingDetails: {
        name: "ad-2125",
        placementID: "placement-12"
      },
      sessionID: "{sid}",
      playhead: 0
    }
  }
});
iOS

Pass the placement ID as a metadata key in the HashMap argument to trackEvent(AdStart). Use MediaConstants.AdMetadataKeys.PLACEMENT_ID.

code language-swift 
var metadata: [String: String] = [:]
metadata[MediaConstants.AdMetadataKeys.PLACEMENT_ID] = "placement-12"

tracker.trackEvent(event: MediaEvent.AdStart, info: adObject, metadata: metadata)
Android

Pass the placement ID as a metadata key in the HashMap argument to trackEvent(AdStart). Use MediaConstants.AdMetadataKeys.PLACEMENT_ID.

code language-kotlin 
val metadata = HashMap<String, String>()
metadata[MediaConstants.AdMetadataKeys.PLACEMENT_ID] = "placement-12"

tracker.trackEvent(Media.Event.AdStart, adObject, metadata)
Roku Edge

Set placementID inside xdm.mediaCollection.advertisingDetails when calling sendMediaEvent for media.adStart:

code language-brightscript 
m.aepSdk.sendMediaEvent({
    "xdm": {
        "eventType": "media.adStart",
        "mediaCollection": {
            "advertisingDetails": {
                "name": "ad-2125",
                "placementID": "placement-12"
            },
            "playhead": 0
        }
    }
})
Media Edge API

Call the adStart endpoint with placementID inside xdm.mediaCollection.advertisingDetails:

code language-json 
{
  "events": [{
    "xdm": {
      "eventType": "media.adStart",
      "mediaCollection": {
        "advertisingDetails": {
          "name": "ad-2125",
          "length": 15,
          "playerName": "Freewheel",
          "podPosition": 0,
          "placementID": "placement-12"
        },
        "sessionID": "{sid}",
        "playhead": 0
      }
    }
  }]
}

Legacy implementation types (Analytics-only)

Media SDK JS 3.x

Pass the placement ID in the contextData object using ADB.Media.AdMetadataKeys.PlacementId:

code language-javascript 
var contextData = {};
contextData[ADB.Media.AdMetadataKeys.PlacementId] = "placement-12";

tracker.trackEvent(ADB.Media.Event.AdStart, adInfo, contextData);
Chromecast

Set the placement ID using ADBMobile.media.AdMetadataKeys.PLACEMENT_ID in the standard ad metadata object:

code language-javascript 
var adInfo = ADBMobile.media.createAdObject("Ford F-150", "ad-2125", 1, 30);
var standardAdMetadata = {};
standardAdMetadata[ADBMobile.media.AdMetadataKeys.PLACEMENT_ID] = "placement-12";
adInfo[ADBMobile.media.MediaObjectKey.StandardAdMetadata] = standardAdMetadata;
ADBMobile.media.trackEvent(ADBMobile.media.Event.AdStart, adInfo, null);
Roku 2.x

Set the placement ID using MEDIA_AdMetadataKeyPLACEMENT_ID in the standard ad metadata object:

code language-brightscript 
adb = ADBMobile()
adInfo = adb_media_init_adinfo("Ford F-150", "ad-2125", 1, 30.0)

standardAdMetadata = {}
standardAdMetadata[adb.MEDIA_AdMetadataKeyPLACEMENT_ID] = "placement-12"
adInfo[adb.MEDIA_STANDARD_AD_METADATA] = standardAdMetadata

adb.mediaTrackEvent(adb.MEDIA_AD_START, adInfo)
Media Collection API

Include media.ad.placementId in the params object:

code language-json 
{
  "playerTime": { "playhead": 0, "ts": 1699523820000 },
  "eventType": "adStart",
  "params": {
    "media.ad.placementId": "placement-12"
  }
}

See the Media Collection API events reference for the full request structure.

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