The IAB Tech Lab on May 6 released for public comment a set of technical specifications that would standardize how CTV ad formats — including emerging ones like Pause Ads and Menu Ads — are signaled programmatically. The comment window runs until June 5, 2026.
This is plumbing, not headlines. But for any publisher selling CTV programmatically, plumbing is exactly where the next wave of yield is going to come from.
01What the spec actually defines
The release covers three things that have been ad hoc up to now:
- Standardized signaling for CTV ad portfolio formats — including pause ads, menu/UI-overlay ads, and other interactive formats — communicated consistently across SSPs and DSPs.
- OpenRTB attribute additions for live content (announced separately April 28; comment window runs to May 28) — letting bidders distinguish livestream, real-time, and first-broadcast inventory before bidding.
- Substitution macro additions that allow more explicit communication of pricing, discounting, and dynamic field substitution between supply and demand platforms.
02Why this is more important than it sounds
CTV ad formats have proliferated faster than the standards to describe them. Pause ads, menu ads, lower-thirds, branded UI, interactive overlays, dynamic creative — every platform has its own metadata, every SSP exposes them differently, and every DSP guesses how to bid.
The downstream effects on the sell side are real:
- Pause ad inventory underprices because DSPs can’t distinguish it from interstitials.
- Live inventory underprices because the time-of-broadcast signal doesn’t survive the OpenRTB round trip.
- Menu and UI-overlay ads underprice because some DSPs filter them out as suspicious.
Standardization fixes these problems by giving every platform the same vocabulary for the same impression.
03What this means for publishers
1. Your CTV inventory is about to be more accurately priced. Implementations that adopt the standardized signaling — even before it’s mandatory — will see better bid density and higher fill on emerging formats.
2. Live inventory deserves a separate sales motion. Once the live attributes land in OpenRTB, live-vs-VOD pricing differentiation will become normal. Publishers should stop bundling live and VOD as a single category.
3. Pause and menu ads are about to graduate from experimental to mainstream. With a standard, these formats can be transacted at scale. If you have stream surfaces that haven’t introduced pause or menu inventory yet, this is the year to do it.
04How to engage with the comment process
05The bigger picture
The IAB Tech Lab’s CTV signaling work, the Programmatic Governance Council, and the agentic frameworks (AAMP, Agentic RTB Framework) all point in the same direction: the next 12 months are about standardizing the language of programmatic itself. Publishers who implement these standards early will win the bid density that comes with being legible.