OOH + ROAS: Future Path or Just a Pipe Dream?

Not the success of an Out-of-Home (OOH) campaign was largely judged by its visibility. If the billboard was iconic, strategically located and impossible to miss, we considered it a successful campaign.

Today, the conversation has changed. The first question every marketer, CFO and procurement team asks is simple: “What was the return on our investment?”

And rightly so. Marketing budgets are under greater scrutiny than ever before. Every medium is expected to demonstrate accountability, and OOH is no exception. This has led to an interesting debate within our industry—can OOH truly be measured through Return on Ad Spend (ROAS), or is it an unrealistic expectation borrowed from digital marketing?

‘Digital captures demand. OOH creates demand’

My view is that ROAS for OOH is neither a pipe dream nor a straightforward reality. It is the future—but only if we stop trying to measure OOH exactly like digital.

That distinction is critical. For years, digital advertising has conditioned marketers to expect immediate attribution. A click leads to a conversion.

A conversion leads to revenue. The journey appears linear.

OOH doesn’t work that way. A consumer rarely drives past a billboard and instantly purchases a car, books a holiday or invests in real estate. Instead, OOH influences something far more valuable—it creates awareness, shapes perception, builds trust and often plants the first seed of intent.

By the time a consumer searches online, clicks on an ad or walks into a store, OOH may have already done much of the heavy lifting.
This is why I often say: “Digital captures demand. OOH creates demand.”

The challenge is that demand creation is inherently more difficult to measure than demand capture. That doesn’t mean it cannot be measured.

Many strides made in measurement, but are they enough?

Over the last few years, our industry has made significant progress in audience measurement, mobility analytics, location intelligence and attribution modelling. Today, we can analyse consumer movement patterns, measure incremental footfalls, study exposure against retail visits, evaluate search uplift and even compare sales performance across exposed and non-exposed markets.

None of these metrics is perfect in isolation. But together, they provide a far more meaningful understanding of OOH’s contribution to business outcomes than we have ever had before.

Having said that, I believe our industry also needs to be honest with itself.

For too long, we have relied on broad statements like “OOH builds brands” without always supporting them with data. While brandbuilding remains one of the medium’s greatest strengths, today’s advertisers rightly expect stronger evidence of effectiveness.

Fortunately, technology has finally caught up with that expectation. Artificial Intelligence, mobility data, geospatial analytics and programmatic Digital Out-of-Home (DOOH) are helping us understand audiences with a level of precision that was unimaginable even five years ago. We are now able to plan campaigns more intelligently, optimise inventory dynamically and evaluate outcomes with far greater confidence.

The questions that matter

The next phase, however, is not about collecting more data. It is about asking better business questions. Instead of asking, “How many people saw my billboard?”, perhaps we should ask:

• Did it increase store visits?
• Did branded search volumes grow?
• Did app downloads improve?
• Did dealership enquiries rise?
• Did sales perform better in exposed markets compared to control markets?

Those are the metrics that matter in today’s boardroom.

At the same time, we should resist the temptation to reduce every campaign to last-click attribution.

Can OOH amplify the entire marketing ecosystem?

Some of the world’s strongest brands were not built because consumers clicked on an ad. They were built because consumers remembered them.

Memory drives consideration. Consideration drives preference. Preference ultimately drives purchase.

OOH has always excelled at building that memory. Its ability to deliver scale, unavoidable visibility and contextual relevance remains unmatched. The future therefore does not lie in proving that OOH works independently of every other medium. The future lies in understanding how OOH amplifies the entire marketing ecosystem.

The most effective campaigns today are rarely channel-specific. They are integrated. OOH creates curiosity. Mobile deepens engagement. Digital converts interest. CRM builds loyalty. Each medium has a role to play.

As an industry, our responsibility is to ensure that OOH’s role is measured with the same seriousness as every other marketing investment—not by forcing digital metrics onto a fundamentally different medium, but by adopting measurement frameworks that reflect how consumers actually make decisions.

So, is OOH + ROAS the future or just a pipe dream?

I believe it is undoubtedly the future. The conversation is no longer about whether OOH can create impact. The conversation is about how effectively we prove it. And that, in my view, will define the next decade of OOH.