Key lessons from the world’s largest out of home media gathering in 2026
It is now on record that the 2026 World Out of Home Congress remains the largest in its history. Recorded in attendance were 807 delegates at the London’s Park Lane Hilton for the industry’s first global gathering in the city since 1989, with media owners, advertisers, agencies and technology partners represented from 55 nations across the world.
The city of London showcased an industry with growing confidence in future of OOH, but also a clear understanding of what comes next. Digitisation and expansion remain important, but the conversation has evolved. Instead, they focused on the capabilities required to make out of home (OOH) more accountable, more accessible and more valuable to advertisers.
The President of the World Out of Home Organization (WOO), Tom Goddard, framed the opportunity in clear terms. Global OOH revenues have reached $54 billion, up 15% on the prior year. Digital now represents 47% of the medium and is on the point of overtaking static for the first time in the industry’s history. Without doubt, the growth is outpacing the wider advertising market in several regions, ably led by Asia Pacific at about 30%.
Five priorities for OOH
Yet Goddard was deliberate in refusing to let those numbers stand as the headline but sets five priorities for the industry and named proving effectiveness as the most urgent of them. He agued that once every media owner in the room understood: deliver the data and the evidence advertisers now demand, and OOH will not simply grow with the market but consistently take a larger share of it.
The acquisitions of the past year have shown that publishers and investors are rediscovering DOOH. At the same time, new operating models among established players and technological automation are accelerating the market’s development. Revenue growth and share growth are different objectives, and the gap between them is where the next decade will be decided.
- Global OOH revenues reached $54 billion, up 15%, with DOOH now making up 47% of the market.
- Measurement is driving OOH’s evolution, with the launch of the WOO Global OOH Audience Measurement Guidelines 2.0 to standardise audience metrics.
- AI, automation and programmatic trading are making OOH easier to plan, buy and integrate into omnichannel campaigns.
- Strong creative remains the key to OOH effectiveness, delivering greater brand recall and commercial impact than technology alone.
- Collaboration through shared standards, research and advocacy is helping OOH attract more advertising investment and strengthen its global growth.
In his keynote remarks, Jean-François Decaux of JC Decaux made a case the industry too often leaves unspoken: OOH funds public transport, civic infrastructure and shared public space, and it does so in full view of the people it serves.
Force for good
“We are a force for good,” he told the room, “not a scam or an addiction, but we need to be heard.” It was at once a defence of the medium’s social licence and a challenge to an industry that has been reluctant to claim it. He paired it with a commercial point.
Audiences spend a substantial share of their waking hours in environments where OOH is present, yet the medium captures only a fraction of total advertising investment. In the markets that have built the measurement and trading infrastructure to compete, OOH already commands double-digit share. The headroom is not theoretical.
Nick Brien of OUTFRONT framed the same opportunity as “In Real Life”. As audiences shift from merely paying attention to taking action, advertising anchored in the physical world is structurally advantaged on reach, influence and, increasingly, trust.
His argument landed at precisely the moment confidence in digital and social environments is being tested by fraud, opacity and synthetic content. Sean Reilly of Lamar kept the room honest, reminding it that the most effective OOH still begins with a powerful idea rather than a sophisticated piece of technology.
Across these sessions, two demands from the buy side recurred without exception: a single, comparable measurement currency, and trading as frictionless as the digital platforms OOH competes against.
Global measurement guide
Measurement sat at the centre of the Congress. The question is no longer whether OOH works, but whether its contribution can be demonstrated using the same standards applied to every other channel. Advertisers increasingly expect evidence, not assertions, and OOH is responding by improving audience measurement, attribution and accountability.
The launch of the WOO Global OOH Audience Measurement Guidelines 2.0, developed with input from measurement bodies around the world, reflected the industry’s commitment to greater consistency and comparability.
Retail media is accelerating the same trend. As OOH moves closer to the point of purchase, exposure can increasingly be linked to action, helping demonstrate business outcomes rather than simply audience delivery. For an industry seeking a larger role within modern media plans, proof is becoming as important as reach.
Technology
Technology ran underneath almost every session. Artificial intelligence, programmatic trading, automation and audience aggregation are increasingly embedded within how campaigns are planned, bought and optimised. WOO and PwC’s first independently aggregated measure of programmatic DOOH highlighted the growing role these capabilities are playing in the evolution of the channel.
The message from London was simple: technology should remove friction, not add it. The operators that succeed will not necessarily be those with the most technology, but those that use it most effectively to simplify planning, buying and measurement.
In doing so, they make OOH easier to integrate into omnichannel strategies and compete for a greater share of advertising investment.
Creative ideas
Creativity held its ground. Tim Bleakley’s “Make Outdoor Creative Again” was a deliberate provocation: weak creative erodes effectiveness, depresses returns and ultimately discourages the very investment the medium is fighting to attract, while strong creative builds memory and commercial impact in ways no amount of targeting can replicate.
As digital inventory multiplies and screens proliferate, the differentiator is not the screen but the idea on it. That is a discipline the industry will have to protect rather than assume.
Collaboration
The Congress reinforced an important reality that many of the challenges facing OOH cannot be solved competitively. Regulation, audience measurement, industry research, buyer-side friction and competition for advertising budget affect every market.
The strongest OOH markets in the world are supported by strong industry bodies, shared research, collective advocacy and common standards.
That principle was reinforced by the launch of WOO’s regulation and policy initiative, a global programme designed to help the industry respond to increasing regulatory restrictions through shared intelligence, best-practice resources, policy monitoring and coordinated advocacy. It reflects a growing recognition that some of the industry’s most important battles are collective rather than commercial.
The same principle is increasingly evident in sustainability. The launch of the Ad Net Zero OOH carbon calculator reflected a shift from aspiration to accountability. Sustainability is becoming an expectation rather than a differentiator, and the ability to measure and reduce environmental impact is becoming part of the industry’s credibility.
Making it make sense
The take out in summary from London is that the future of OOH would not be determined by how many sites, formats and screens we erect or how many impressions we report. Rather it would be determined by our ability to collaborate as well as combine the trust and impact of the real world with the accountability, accessibility and intelligence advertisers expect devoid of cluttering our environment as less is more in the real sense.
