Your customers don't live on one screen. In a single day they pass a billboard, sit under a TV at the gym, stream a show after dinner, and scroll their phone in line for coffee. Cross-screen advertising is the practice of reaching them across all of those moments with one coordinated campaign — instead of running four disconnected buys on four different tools.
It's a simple idea with a big payoff: the same message, in the same look, showing up wherever attention actually is.
The screens that make up "cross-screen"
A cross-screen campaign typically spans four surfaces:
- Out-of-home (DOOH) — sidewalk screens, in-venue TVs, transit panels, and digital billboards. The screens of real life. (What is DOOH?)
- Connected TV (CTV) — streaming apps on the living-room television. (What is CTV?)
- Premium publishers — video and display on trusted sites like USA Today, Fubo, and Disney properties.
- Mobile, geo-fenced — phones, targeted by precise location.
Run separately, each is a silo. Run together, they reinforce each other: someone sees your offer on the street, again on the TV that night, and once more on their phone — and the message lands.
Why one campaign beats four
Stitching channels together by hand is the old way, and it's painful. Different platforms, different creative specs, different reporting, different logins. Most small and mid-sized advertisers simply can't afford the time, so they pick one channel and hope.
Cross-screen platforms collapse that work:
- One creative, every surface. You upload a single video; it's automatically cropped and formatted for each screen.
- One geography. Set your target once — a block, a ZIP, a city, or the whole country — and it applies everywhere.
- One budget and one view of results. No reconciling five dashboards.
The result is the reach and repetition that used to require an agency, available to a business running it from a phone.
"All screens unlocked"
That phrase is the whole thesis behind Glo. Premium real-world and living-room screens were locked behind big budgets, contracts, and gatekeepers. Glo's job is to open them — self-serve advertising for every screen, DOOH first, CTV also, starting at $29/day with no contract.
Practically, that means you turn one good Reel into a campaign that runs on sidewalk screens, in-venue TVs, connected TV apps, premium publishers, and geo-fenced phones — pointed exactly where your customers are, whether that's a single neighborhood or a national footprint.
Is cross-screen right for you?
If your customers are local, cross-screen lets you own a neighborhood — be on the screens people pass every day, then follow up in their living rooms. If you're scaling nationally, it gives you coordinated presence without a media team. Either way, the advantage is the same: show up in more of the moments that matter, from one place.
Ready to see how it comes together? Start with how to launch a cross-screen campaign in 60 seconds, or weigh the channels in DOOH vs. CTV vs. social.