The clean split
Indoor DOOH lives where you stop — malls (shopping), hotels (sleeping), hospitals (waiting), gyms (working out), salons (sitting), cinemas (watching), restaurants (eating). The audience is captive, the dwell time is measured in minutes to hours, and the venue itself defines the audience profile.
Outdoor DOOH lives where you move — roadside billboards, transit stations, marquee LEDs, façade walls. The audience is in motion, the dwell time is measured in seconds, and reach scales much faster than indoor.
Five dimensions, side by side
1. Dwell time
Indoor: 30 seconds (cinema concession) to 60+ minutes (hospital waiting, salon, gym). Outdoor: 2-8 seconds typical (roadside), 30-90 seconds (transit platform). Indoor wins when creative needs to breathe; outdoor wins when 3-second brand recall is enough.
2. Audience density vs precision
Outdoor: high raw impression density, broad audience. Indoor: lower density, sharper audience definition. A mall screen sees fewer impressions per hour than a highway billboard, but everyone seeing it is a shopper in shopping mode.
3. Cost per impression
Outdoor often delivers a lower absolute CPM. Indoor delivers higher CPM but better category-fit conversion. Effective cost per qualified impression frequently favors indoor for premium / niche categories.
4. Creative format flexibility
Indoor: muted audio sometimes, longer creatives (15-30 sec) work, interactive elements (QR scans) convert. Outdoor: always silent, 7-10 sec is the practical cap, motion-driven creative wins.
5. Regulatory complexity
Outdoor: municipal permits, traffic clearances, periodic audits. Indoor: venue-controlled, no municipal layer, content moderation per venue. Indoor is operationally simpler.
Category fit
Categories that perform better on indoor:
- Beauty, skincare, cosmetics (salons, malls)
- Wellness, nutraceuticals, OTC (hospitals, gyms)
- Premium F&B, payment apps (restaurants, cafés)
- Luxury, jewelry (premium hotels, mall atriums)
- B2B SaaS, professional services (corporate, co-working)
Categories that perform better on outdoor:
- Automotive (highway corridors, premium roadside)
- Telecom (transit, commuter routes)
- BFSI cards (urban arterials, transit)
- FMCG flagship launches (mass-reach roadside)
- Event / launch announcements (high-visibility city sites)
The hybrid that converts
Most effective DOOH plans use both. Outdoor for awareness and reach at top-of-funnel; indoor for category-fit and conversion at decision point. A retail campaign might use roadside billboards on highways leading into a city, and atrium video walls + mall storefront displays inside the destination malls. Same brand, same week, same creative spirit — different surfaces, different jobs.