POC: Introduce Prebid's OM Script

[YuriyVelichkoPI]

Motivation

Handle in-app viewability tracking via Open Measurement.

Objectives

• Introduce a Prebid-specific OM tag which will track events received in the bid response
  • TODO: more details
• Introduce integration guide:
  • Option 1: add OM tag to PUC
  • Option 2: add OM tag to creative on GAM

[ValentinPostindustria]

OM JS PR.
PUC PR.

Implementation

We have tested the burl impression tracking using embedded OM SDK integration and the modified PUC with the custom OM script for Prebid. This kind of integration works great.
By default PUC tracks impressions with MRAID, so OM impression tracking must be activated optionally. Modify the creative on the GAM platform and add the additional parameter.

  ucTagData.mobileImpressionTracker = "open_measurement";

Testing

Before the JS script is merged and the new version of the PUC is released, for testing this feature you should use a proxy and replace some responses.

• Modify the example in the Demo Kotlin app Banner 320x50 Original API with the new ad unit id /21808260008/prebid_demo_app_original_api_banner_om_tracker.
• Disable native tracking by removing the line adUnit?.activatePrebidImpressionTracker(adView).
• Replace the response to URL https://cdn.jsdelivr.net/gh/prebid/prebid-mobile-android/scripts/js/om_impression_tracker.js with om_impression_tracker.js from the archive.
• Replace the response to URL https://cdn.jsdelivr.net/npm/prebid-universal-creative@latest/dist/creative.js with creative.js from the archive.

mock.zip

Now you should see tracking of the https://prebid-server-test-j.prebid.org/test/burl URL from the OM SDK.