Digital signage is a screen in a shared space (above a café counter, in a shop window, beside a lift, outside a meeting room) whose content is managed remotely by software and changes without anyone standing in front of it with a remote or a USB stick. The screen itself is ordinary. What makes it signage is what sits behind it: a small player that runs the content, a dashboard where someone decides what plays and when, and a connection that carries those decisions to the screen.
So the useful answer to "what is digital signage?" is not "a TV showing adverts". It is a way of replacing printed posters, chalkboards and notice boards with something you can change in seconds from a laptop, on one screen or on fifty, and that switches itself on and off with your opening hours. The rest of this guide explains the parts, what people use it for, what it roughly costs, and how to start without buying anything you will regret.
Digital signage vs a TV with a USB stick
A common first attempt at digital signage is a TV playing a slideshow from a USB stick. Pictures appear, so in one sense it works. What it cannot do is the part that matters after the second week:
- change the content without somebody walking to the TV with a new stick;
- go dark at closing time and come back on at opening time, on its own;
- put the same offer on the screens in three branches at once;
- tell you whether the screen was actually on yesterday afternoon;
- come back after a power cut, playing, without anyone looking for the remote.
Digital signage is the name for the systems that do those things. The screen can be the same TV. What changes is who controls it, from where, and what happens on a bad day.
How digital signage works: the five parts
Every setup, from a single screen in a bakery to hundreds across a chain of shops, is built from the same five parts. Once you know them, product pages and quotes become much easier to read.
1. The screen
The display people look at: a consumer TV, a commercial display built for long hours, a tablet on a counter, or at the large end a video wall. For most small businesses it is a 32" to 55" panel on a wall or hung from the ceiling, either landscape or turned on its side for portrait.
The differences that matter are rarely the ones printed on the box. A consumer TV is built for a few hours of viewing a day; a commercial display is rated for 12 to 24 hours and is usually brighter, which counts behind a shop window. Whether the screen switches itself back on after a power cut matters more than whether it is 4K. The differences between a signage display and a TV are worth ten minutes before you buy.
Size follows distance. A rule of thumb that holds up in real rooms: the furthest person who needs to read the screen should be no more than six screen heights away for large text, and no more than four for something read line by line, like a menu. The hardware guide turns that into a table, from a counter to a lobby.
2. The player
The small computer that runs the content and sends it to the screen over HDMI. It is usually one of these:
- an Android TV box or stick behind the screen, the most common choice;
- the screen itself, if it runs Android TV or Google TV and can install apps;
- a Windows PC or a Mac, often one already under the counter;
- a web browser in full-screen mode, which is the quickest way to try things out.
Much of a system's reliability lives here. A good player starts playing by itself when the power comes back, recovers if the page it shows freezes, and keeps playing from its own storage when the internet drops.
Smart TVs are the usual trap. SignageStack has no app for Samsung's Tizen or LG's webOS, and while a TV's own browser can often open a web page, it will not restart itself after a power cut or stay locked in full screen. An unattended screen on one of those TVs needs a small Android box behind it. Amazon Fire TV sticks and Raspberry Pi boards come up often too; both can be made to run signage, but SignageStack has not qualified either, so we do not promise them. The guide to the digital signage player covers the options in detail.
3. The software
The part you actually work in, often called a CMS, for content management system. It has two halves. One is a dashboard in your browser, where you upload content, arrange it into playlists, set when each screen plays and see which screens are online. The other is the player software on each screen, which receives those instructions and carries them out.
Software comes in three broad shapes: hosted services paid per screen per month; free tiers and open-source projects you run yourself; and enterprise suites priced by quote. They differ less in what appears on the screen than in everything around it: scheduling, offline playback, managing screens in several places, and who is allowed to change what. How to choose digital signage software has a checklist of questions to put to any of them.
4. The content
What people see. It comes in roughly four kinds:
- Images and video you make or already have: this week's offer, a photo of the new dish, a short product clip.
- Live information that updates itself: the weather, exchange rates, news headlines, a meeting room's bookings, a table from a spreadsheet.
- Documents: a PDF, a slide deck, a design made in a tool such as Canva.
- Layouts that combine several: the menu in one panel, the weather in another, short messages scrolling in a third.
Content is arranged into a playlist, an ordered list in which each item holds the screen for a set number of seconds before the next one comes on, looping until you change it. Some products can also swap playlists by time of day; SignageStack does not. When the menu changes, you switch one item off and another on, and each screen's working hours decide when it plays at all: opening times through the week, or only the two weeks of a trade fair. In SignageStack the live pieces are called apps. You fill in a form once (the city, the calendar, the address of a news feed) and from then on the screen keeps itself current.
5. The network
A connection carries changes from the dashboard to the screens. It is needed to pair a screen and to receive updates. A well-built player does not need it to keep playing: it stores the playlist, the screen's working hours and the media on the device, so a dropped connection delays the next change instead of blanking the wall. Only content that is live by nature, such as a web page or a YouTube video, has to wait for the connection to come back. Wired ethernet is the most dependable; Wi-Fi is fine if the access point is close to the screen.
What happens when you change a price
Following one change from the dashboard to the wall is the clearest way to see the five parts working together. This is how it goes in SignageStack, and hosted systems in general work along similar lines:
- Someone opens the dashboard on a laptop and changes the price of a flat white on the menu board.
- They press publish. The service pushes the change down an open connection to every screen showing that board, and it arrives in seconds.
- Each player downloads anything new it needs, such as a photo, before it switches, so nothing appears half-loaded.
- The screen shows the new price, and the player reports back what it is playing. That is how the dashboard knows the change landed.
- If the café's internet drops ten minutes later, the board carries on from the player's own storage, and the screen still goes dark at closing time, because its working hours are kept and checked on the device.
No USB stick, no reprinting, nobody on a ladder. That sequence is most of what digital signage means in practice. The how it works page goes through the same steps with the dashboard in view.
What is digital signage used for?
Anywhere people stand, wait or walk past and need to know something. The most common uses:
- Menu boards in cafés, bakeries and restaurants, where prices change in seconds and the lunch menu replaces breakfast with a couple of taps on a phone.
- Shop windows and shop floors: this week's offers, put up and taken down in seconds, a QR code that opens the product online.
- Receptions and lobbies: a welcome, the time and the weather, today's events.
- Meeting rooms: the day's bookings on a screen beside the door.
- Waiting rooms: practice news, what to expect, how to book the next appointment. Calm, slow and silent.
- Schools and offices: announcements, timetable changes, countdowns to events. The notice board, without the drawing pins.
- Factories and warehouses: safety messages, shift information and figures for people who never sit at a desk.
For what goes on the screen in each of these, and why it works, see the digital signage examples by setting.
Some related things share the name but are different projects. Touchscreen kiosks, where people tap to find information or place an order, need hardware and software built for input. Video walls and outdoor LED billboards join many panels or modules into one picture and are usually installed by specialists. This guide is about the common case: screens people look at, indoors or behind a window, playing content on a loop.
What does digital signage cost?
For a small setup there are four costs, roughly in order of size:
Part | What it costs | Notes |
|---|---|---|
Screen | Nothing if you use a TV you already have; more for a commercial display | Usually the largest single cost |
Player | An Android TV box that does the job typically costs €40–€120 | Nothing extra if the screen runs Android TV or Google TV, or a computer is already there |
Software | A fee per screen per month or year, or your own time for free and self-hosted options | SignageStack is €11 per screen a month, or €100 a year, excluding VAT |
Installation and content | A mount, cables, perhaps a new power socket; the time to make and update content | The time is the cost people forget |
A worked example: a café with a TV already on the wall adds a box and a subscription. With a box in that typical range and SignageStack paid yearly, the box and the first year of software come to roughly €140 to €220, with the software excluding VAT. Every year after that is the subscription alone. A chain of shops buying commercial displays is a different sum, and the full cost breakdown works through both.
Where digital signage goes wrong
Screens that disappoint tend to fail in one of three ways, and a bigger screen fixes none of them.
Nobody owns the content. The Christmas offer is still up in February. A screen with stale content is worse than no screen, because it teaches people to stop looking at it. Decide who changes it, and how often, before you buy anything. Put each offer's end date in your own calendar and switch it off that day; nothing takes it down for you.
It cannot be read from where people stand. Text sized for a laptop, twelve items on one slide, a slide that moves on before anyone has finished reading it. One message per slide, large type, and enough seconds for a slow reader.
It goes dark and stays dark. A power cut, a TV that waits for its remote, a frozen player, a Wi-Fi password that changed. Automatic power-on, a player that recovers by itself and offline playback are dull features, and they decide whether a screen is still working in six months.
Where to start
Start with one screen and one job: the menu, the window or the reception. You do not need to buy anything to find out whether it works for you.
- Plug a laptop into the TV you already have and open the web player in a browser. It shows a six-character code.
- Type the code into the dashboard under Add screen. The screen is now paired.
- Build a short playlist (three or four items is plenty) and add it to the screen.
- Live with it for a week. If it earns its place, a small Android box behind the TV is the usual next step.
SignageStack's trial runs for 21 days with every feature, on one screen, and needs no card. The step-by-step setup guide walks through each stage in more detail.
