Release – MAB Version 4.2.0

Release date: 09 March 2026
Status: Live in production
Audience: All MyAdbooker users

TL;DR (highlights)

Audio creative support — SSP now supports programmatic audio creatives

Metro arrival tracking trigger — experimental beta available for testing

No downtime and no client action required

1) What’s New

Audio Creative Support

What changed:

• The platform now supports programmatic audio creatives, allowing campaigns to serve audio-only inventory (e.g., in-store radio networks or other environments without screens).
   
• Supported audio format:

• audio/mp4 (AAC)
• audio/wav
• audio/ogg
• audio/flac
   

• Audio creatives are processed through the existing creative approval workflow, requiring no separate steps.
• Audio demand can be handled via standard OpenRTB programmatic channels.
   

Why it matters:

• Enables programmatic audio demand without introducing a separate SSP or workflow
• Lays the foundation for future audio advertising features
   

Note:

• Advanced audio metrics, PMP audio hosting, or custom audio player logic are not included in this release.
  
   

Metro Arrival Tracking Trigger (Experimental Beta)

Where: Campaign Targeting

What changed:

• A new Metro Tracking trigger is available for campaigns.
• Currently released in experimental beta, and behavior/accuracy may be refined during testing.

Note:

• Existing Metro arrival campaigns should continue using the original Metro arrival trigger.
• The new trigger is for testing and validation only.

Why it matters:

• Provides early access to targeting based on metro arrival events
• Feedback from this beta will guide improvements for wider release
   

2) Improvements

No additional improvements included in this release.

3) Bug Fixes

No client-facing bug fixes are included in this release.

Minor internal UI adjustments and stability improvements have been implemented.

4) Impact & Risk Statement

• No downtime occurred during deployment
• No client action is required

• Existing campaigns, integrations, and workflows remain unaffected3

5) FAQs

Q: Do I need to take any action for this release?
A: No. This release does not require any client action.

Q: Was there any downtime during deployment?
A: No. Version 4.2.0 was deployed without downtime.

Q: What types of audio creatives are supported?
A: The platform currently supports audio creatives (audio/mp4 (AAC), audio/wav, audio/ogg, audio/flac) via programmatic OpenRTB demand.

Q: Can I upload audio creatives for PMP deals?
A: No. This phase focuses on third-party programmatic demand only.

Q: What is the Metro Tracking trigger?
A: It is a new experimental beta feature for metro arrival-based campaign targeting, currently available for testing only.

Q: Will existing Metro arrival campaigns be affected?
A: No. Existing campaigns continue to use the original Metro arrival trigger.