In 1964, Jean-Claude Decaux invented the concept of advertising-funded street furniture. This was a truly analog innovation: physical shelters and street-level assets financed by advertising, which laid the foundation for an entirely new business model for out-of-home (OOH) media.

Since then, both advertising and urban environments have undergone a fundamental transformation. With the advent of digitalization, mobile screens, and data-driven marketing, the demand for relevance, flexibility, and measurability has intensified. JCDecaux has evolved in tandem with this shift—transforming from a purely analog player into a company that now offers both classic analog OOH and digital out-of-home (DOOH), with capabilities for programmatic buying and real-time data-driven campaign management.

When JCDecaux became the world’s largest outdoor advertising company in 2011, built on three pillars—street furniture, transport advertising, and billboards—it marked the beginning of a new phase. Today, our mission is to combine the best of both worlds: the scalable reach and urban presence of analog OOH with the precision, dynamism, and measurability provided by digital and programmatically purchased DOOH. In doing so, we continue to develop the core concept established in 1964: making the city more functional, aesthetically pleasing, and relevant for people on the move.

Two Sides of the Same Coin

OOH and DOOH are effectively two sides of the same coin. Both are focused on securing visibility in environments where people move: on streets, in plazas, at transit stations, and within public transport systems. The distinction lies in how the message is displayed and the degree of flexibility available in managing it over time.

Classic OOH (Out-of-Home) consists of static surfaces: bus shelters, street furniture, independent “Eurosize” panels (with public information on one side and advertising on the other), analog subway advertising, and larger-scale billboards such as our “Supersize” format. The message remains displayed 24/7 throughout a campaign period, providing a stable, predictable presence. For brands looking to build broad reach, work with a few clear assets, and keep production simple, this often serves as an effective foundation for the media mix. Standardized networks also simplify planning and procurement for both advertisers and agencies.

DOOH (Digital Out-of-Home) is the digital evolution of the same channel. Messages are displayed on screens rather than posters, allowing for dynamic changes, optimized playback, and time-sensitive communication without the need for physical printing and installation. This becomes particularly compelling when timing and context are paramount: morning messages along commute paths, lunch offers near retail hubs, or campaigns that scale up during weekends or specific events. Examples of these formats include Digisize (standalone street-level screens), MetroVision (Europe’s largest digital network in the subway), and Supersize Digital (a 60-square-meter digital billboard).

Performance and Impact

Research, including studies by JCDecaux and Neuro-Insight, demonstrates that brain response intensifies when a message is contextually relevant, leading to improved ad recall and increased sales. For instance, dynamic, data-driven DOOH campaigns have shown up to 16–17% higher sales and significantly stronger brand impact compared to non-dynamic counterparts (DecisionMarketing / JCDecaux Neuro Study).

Additional studies show that DOOH often drives more immediate action—such as search queries, store visits, or purchases—and is perceived as more innovative and engaging. For example, data from GroupM indicates that consumers frequently report that DOOH campaigns have prompted direct action, with the channel ranking highly in brand experience and creativity.

Strategic Integration: OOH and DOOH

The choice between OOH and DOOH is, therefore, less about “analog vs. digital” and more about the required level of campaign dynamism. If the objective is long-term awareness with a limited number of assets and stable presence, traditional OOH formats are highly effective. However, when a campaign requires high situational relevance—such as price offers, store traffic incentives, or messaging linked to weather, inventory status, or live data—DOOH becomes a more potent tool. Data triggers (such as weather, time of day, or specific events) can be integrated to control when, where, and how various assets are displayed. VIOOH and similar SSP platforms have emerged to make it easier for agencies and advertisers to purchase DOOH programmatically and integrate it into the same planning cycles as other digital channels.

There is also a creative dimension where OOH and DOOH converge. Various creative activations—which we categorize as “Innovate” solutions—can combine physical structures with digital screens and motion content. A “takeover” of a high-impact digital site offers the same effect as a classic dominance campaign, but with the added power of moving imagery, multiple assets, and real-time messaging control. Industry media, such as The Drum, often highlights the combination of physical impact and dynamic, contextual communication as a key reason for the rapid growth of DOOH in global media plans.

Conclusion

In practice, the question is rarely “DOOH or OOH?” but rather “how do we use both to the greatest effect?”

A common strategy for large-scale campaigns is to:

• Utilize static OOH to build broad reach and a stable base presence in key environments.

• Layer DOOH on top to increase relevance over time, manage ad pressure during key moments, and test multiple creative variants.

Research into the interplay between these channels also shows that they do not merely perform well in isolation; they strengthen the effect of other channels. Lumen and JCDecaux have shown that exposure on public screens can “prime” the target audience, causing them to pay greater attention to advertising in digital channels subsequently.

When OOH provides reach and physical presence, and DOOH adds time- and data-driven relevance, the result is a channel that both builds long-term brand equity and drives immediate action. This is where out-of-home advertising, in both its analog and digital forms, reaches its full potential within the media mix.