You have screens in the corridor, the canteen and the workshop. People walk past them all day, the playlist is current, and the message still does not arrive. Before you rewrite the content one more time, it is worth asking a duller question: who was standing in front of that screen, and what were their hands doing?
If you are still mapping which channels belong in your mix at all, start with the overview in what internal communication is and which channels belong to it. This piece assumes you have already chosen screens and are wondering why they are not enough.
What a screen does that no other channel does
Digital signage earns its place on one specific job. It puts a message in a shared physical space, with no login, no device and no mailing list. For a colleague with no company email account and no work phone, that is not a convenience. It is often the only channel that reaches them at all.
Presence keeps proving itself in frontline research. Gallagher's 2026 Employee Communications Report, drawn from more than 1,300 communications and HR professionals across 40 countries, found in-person town halls to be the most effective format in frontline settings. Where the work happens away from a desk, being physically in the room still outperforms a well-designed inbox.
The screen is doing real work, then. The question is what falls outside it.
Where the screen stops
Three limits, and none of them are about the quality of your content.
Attention needs free eyes. A screen asks for a glance. That is a small ask in a canteen queue and an impossible one on a line, in a cab, or with two gloved hands inside a machine. The people who most need the operational message are often the people whose eyes are committed elsewhere at the exact moment it is on screen.
A wall cannot be paused or replayed. Signage broadcasts on its own clock. If the slide with the new procedure rotates past while someone is finishing a task, it is gone for them until the loop comes round, and there is no way back to the sentence they half-heard. This is not a flaw in anyone's product. It is what a broadcast display is, and every screen-based channel shares it.
Presence is not evenly distributed. A screen only reaches people who are in that building at that hour. Across the EU in 2025, 21.3% of employed people aged 15 to 64 usually worked at weekends, rising to 47.6% among service and sales workers, according to Eurostat. Night shifts, field engineers and drivers pass the canteen screen rarely, and some of them never do.
Emergence Capital puts the deskless workforce at 2.7 billion people, roughly 80% of the global workforce. Reaching them well is still the exception: in the same Gallagher research, desk-based organisations were three times more likely to have a well-understood employee value proposition than frontline workforces.
Incomplete is not the same as wrong
None of this is an argument for taking screens down. It is an argument about coverage. A screen covers the moment when someone is present, stationary and free to look, and that moment exists in every organisation.
What it does not cover is everything either side of it. The shift that never overlaps with the canteen. The two hours in the van. The ward round. The colleague who takes in a policy change better by hearing it twice. When internal communication runs on a single medium, that coverage gap is not a content problem you can write your way out of.
The layer that reaches the people the screen misses
Audio is the one format built for occupied hands and eyes. That claim is testable, and it has been tested. In a randomised crossover trial published in PLOS One in September 2025, 41 participants listened to educational podcasts in three conditions: undistracted at a desk, driving a simulated city route, and driving a simulated country route. Knowledge acquisition showed no significant difference between them, and the small edge that appeared for one driving condition on immediate recall had gone a month later.
Read it narrowly and it still says something useful: people who are driving take the episode in.
Audio also has the two properties a wall lacks. It waits, and it repeats. An episode sits there until someone has ten free minutes, and a sentence that got missed can be played again without asking anybody to repeat themselves.
The format is familiar by now, too. In Edison Research's Infinite Dial 2026, based on 2,050 Americans aged 12 and over, 58% had listened to or watched a podcast in the past month. That is US data, so treat it as a signal about format literacy rather than a European benchmark.
On the line: production
The screen above the line carries today's output and the safety reminder, and it does that well. What it cannot carry is the twenty-minute explanation of why the changeover procedure moved. Put that in an episode a team lead plays at handover, or that operators listen to on the walk to the lockers. The screen keeps the number. The audio carries the reason.
On the ward: care
On a ward, the staffroom screen gets read in the gaps between patients, which means a long policy update loses to the coffee. A short episode a nurse can start while walking between wards, then pick up later at the same point, does not compete with patient time in the same way. Anything with nuance, such as a change in escalation protocol, belongs in the format that can be replayed.
In the van: field service
An engineer who is on site four days out of five may not see an internal screen for weeks. The van is the one predictable block of undivided time in their week. A fortnightly episode covering the product change, the recurring fault pattern and the voice of the person who made the call reaches them where they actually are.
Running the two together
Do not duplicate. If the screen and the episode carry the same words, you have added work and no coverage.
Start with the message, then split it by what each medium is good at. The screen takes what is true right now and readable in three seconds: numbers, dates, reminders, recognition. Audio takes what needs explaining, and anything that lands better in a person's own voice than in a paragraph.
Then decide per audience rather than per channel. One list of roles with two columns, "sees a screen regularly" and "has hands free to listen", is usually enough to expose the gap in an afternoon.
Distribution stays inside the organisation. An internal podcast on Springcast runs through a private branded app for employees or as a hidden show on the platform, and the listening data goes down to completion per episode rather than stopping at a download count. That answers a better question than whether the message was sent: whether the fifteen-minute explanation was finished.
So, is digital signage enough?
No, and that is a statement about scope rather than quality. Signage is a strong answer to "how do I reach the people who are here". It was never designed to answer "how do I reach the people whose hands are busy, or who are somewhere else entirely". Add a layer that covers the second question and your screens get better, because they stop being asked to carry things they cannot hold.