Why CTV’s Biggest Problem Isn’t Demand. It’s Proof.

Every conversation I have about connected TV starts the same way. Someone quotes the growth numbers. 46 million households. Ad spend climbing north of 20% year on year. The living room, finally addressable. And every time, I find myself wanting to steer the conversation somewhere less comfortable.

Because the demand isn’t the problem. The demand has arrived. Advertisers want CTV inventory. Publishers are rushing to supply it. The money is real and it’s growing.

The problem is that CTV still can’t prove what it’s selling. And until it can, the entire category will keep leaving money on the table.

Let me explain what I mean by proof.

When I spent my years on the publisher side, I could tell an advertiser almost anything they wanted to know about a display campaign. Which article the ad ran against. What time it served. Whether it was viewable, for how long and what the user did next. The feedback loop was tight. The advertiser trusted the number because the number could be checked.

CTV doesn’t have that loop yet. Not fully. A publisher running CTV inventory today often can’t confirm something as basic as whether the television was actually switched on when the ad played. Industry estimates have put “TV off” ad delivery in the double digits globally. In a market like India, where device transparency varies wildly across manufacturers and operating systems, the real figure is anyone’s guess.

Sit with that for a moment. We are building the fastest-growing premium advertising channel in the country on a measurement foundation that can’t always confirm a human was in the room.

This is not an argument against CTV. I am genuinely bullish on it. It is an argument about where the real work lies. The industry keeps treating CTV’s challenge as a supply problem — get more inventory, sign more publishers, fill more slots. But supply was never the constraint. Trust is.

Here’s what I’ve come to believe after watching this play out across multiple publisher environments. The publishers who will win on CTV are not the ones racing to list the most inventory. They are the ones building the proof layer first. Measurement that stands up to scrutiny. Verification an advertiser doesn’t have to take on faith. The ability to walk into a room and say “this was real, verified, human attention” and back it with data rather than a deck.

That capability is worth more than volume. Because when proof is scarce, the publisher who has it doesn’t compete on price. They set it.

I’ve seen the opposite scenario too many times. A publisher scales CTV inventory aggressively, sells it on the strength of the format’s reputation rather than verified performance and does well for a quarter or two. Then a sophisticated advertiser runs their own measurement, finds the gap between what was promised and what was delivered and the pricing conversation resets downward for everyone. Unproven inventory doesn’t just underperform. It drags the whole category’s credibility with it.

The uncomfortable truth is that CTV is being sold today largely on narrative. The big screen. The lean-back viewer. The premium environment. All of it is true and none of it is measurement. Narrative gets you the first budget. Proof gets you the renewal.

So what does building the proof layer actually involve? Three things, in my experience.

First, measurement that goes beyond the impression. Completion rates and viewability are table stakes now. The real question is attention was the viewer present, engaged and reachable in a way that connects to an outcome? That is harder to measure and far more valuable to prove.

Second, cross-device honesty. The CTV viewer doesn’t live only in the living room. They convert on their phone, research on their laptop, return to the couch tomorrow. A publisher who can connect that journey, even partially, offers something a siloed impression never can.

Third, first-party data that makes the audience addressable beyond a device ID. This is where publishers have a structural advantage they consistently underuse. They know their audience. Turning that knowledge into verifiable, privacy-safe targeting is the difference between selling a screen and selling an audience.

None of this is glamorous. It’s infrastructure work. It doesn’t make headlines the way a big CTV deal does. But it is the work that determines who commands premium pricing three years from now and who is left competing for scraps at the bottom of the market.

CTV’s growth story is real. I’m not questioning the demand. I’m questioning whether the industry has the discipline to build the proof that demand deserves.

The publishers who figure this out won’t just participate in the CTV opportunity. They’ll define its terms.

Akash Sharma, Chief Strategy Officer at Admerly