Every organisation communicates internally, whether or not anyone is responsible for it. People find out what is happening from a manager, a canteen screen, a colleague or a rumour. The practice exists either way. The choice is whether anyone shapes it: what it covers, which channels carry it, and who ends up on the receiving end.
A definition you can quote
Internal communication is the deliberate exchange of information within an organisation, in both directions between the organisation and the people who work for it, so that employees know what is happening, understand why, and can act on it in their own work.
Each clause in that sentence is doing a job. Deliberate separates the practice from the rumour mill, which communicates efficiently and entirely without you. In both directions is the clause organisations skip most often: a channel that only broadcasts is a public address system, and it tells you nothing about whether anything landed. Act on it is the test that matters. If a message changes nothing in anyone's week, it was published rather than communicated.
The Institute of Internal Communication, the professional body for the field in the UK, describes the purpose in a single line: internal communication "aligns strategy, builds trust, strengthens culture, boosts collaboration and drives performance" (Institute of Internal Communication, read 28 August 2026). That is the outcome. The definition above is the mechanism.
What belongs to it, and what does not
Internal communication covers strategy and direction, organisational change, leadership visibility, operational and safety information, culture and recognition. And the two-way part: questions, feedback, and the answers that come back.
It does not cover the systems that run the organisation. Rostering, ticketing, expense forms, the HR case file: those are workflow tools, and calling them internal communication is how a channel plan turns into a shopping list. The distinction matters at procurement time, because plenty of platforms in this category do the administration and treat communication as a tab.
The channels, one by one
Intranet. The reference layer: policies, procedures, who does what, the thing people look up rather than the thing they are told. It works when someone goes looking, which makes it close to useless for anything time-critical.
Email. Still the workhorse for anything that needs a record, a timestamp and a defined recipient list. Volume is what kills it, and it assumes the reader has a company mailbox and a moment to open it.
Chat (Teams, Slack). Fast, conversational, good for coordination inside a team that already knows what it is doing. Bad for anything that has to survive the week, because a message in a busy channel has roughly the shelf life of a spoken sentence.
Line managers. The highest-trust channel in most organisations, and the one you control least. A message reaches its final form in the words of someone's own manager, which is why briefing managers properly does more for reach than any tool on this list.
Town halls and all-hands. The moment for direction, and the only routine slot where anyone can ask a question in front of everyone else. Frontline audiences in Gallagher's Employee Communications Report 2026 rate in-person town halls as their single most effective channel, at 51 percent.
Digital signage. Screens in the canteen, the corridor or the workshop, reaching people in a shared space with no login and no device needed. The limits are hard ones: a screen cannot be paused or resumed, cannot be targeted at one person, and only reaches people who look up.
Print. One of the few channels that reach a workplace where phones are locked away or there is no signal, and the only one that survives a shift handover on a noticeboard. Slow, expensive per update, and impossible to correct once it is out.
Video. The right choice when something has to be shown rather than described: a new machine, a new process, a leader whose face people should recognise. It needs eyes and a stationary moment, which is a bigger ask than most channel plans admit.
Audio. Carries tone, reasoning and length, which is exactly what a written summary flattens out. It is the only channel here that works while someone's hands and eyes are busy. Weak for urgency, and wrong for anything that needs a signature.
How to choose: three questions
Does this need to be known, or understood? A closing date or a new door code needs to be known, and belongs on the channels that push and record. A reorganisation, or any decision people will argue about, needs to be understood. Understanding takes length: a town hall, a manager conversation, an episode someone can listen to twice.
How long does it need to survive? A shift, a quarter or permanently. Chat is fine for the first, email for the second, and the intranet is the only honest answer to the third.
Where are this audience's eyes and hands? Almost nobody asks it, and it decides more than the other two.
The audience nobody's channel plan covers
Most channel plans are written by people at a desk, for people at a desk. Emergence Capital counted more than 2.7 billion deskless workers worldwide in The State of Technology for the Deskless Workforce, published in December 2020, around 80 percent of the global workforce at that point. They are in factories, wards, warehouses, vehicles, classrooms and shops, and almost none of them will read an intranet page during a shift.
Gallagher's 2026 research, based on more than 1,300 communications and HR professionals, finds the same gap in what those people receive. Organisations with a majority-frontline workforce are, in the report's words, "potentially 'strategically underserved,'" getting the lowest volume of strategy and change content of any group. The people furthest from the decision hear least about it.
Take it role by role and it stops being abstract. On a production line, hands are occupied and eyes are on the work, so a screen catches the safety notice and nothing longer; the reasoning behind a process change has to arrive as sound, on the walk in or during a changeover. In care, the shift does not pause for a town hall and the handover is already full, so anything longer than a headline has to be listenable in the ten minutes between locations. In field service, people are alone in a van for hours. No intranet, no colleague to check with, and one input channel that is legal and free: audio.
That is where an internal podcast fits, with the limits stated up front. It sits next to the intranet or employee app, never in place of either. It is asynchronous, and it is useless for anything urgent. In exchange, it carries an argument at full length to people who were never going to read one. That is the job we built our internal podcast platform for.
How you know it is working
This is where the field is weakest, and Gallagher puts a number on it. Of the communicators surveyed, 70 percent "are stuck tracking activity through basic outputs like opens, clicks, and views. Only 16% are measuring outcomes and only 12% are considering how communications are driving business impact." In the same research, 83 percent say information overload is a growing problem, and fewer than one in five are satisfied with their ability to personalise to their audience.
Those three findings are the same finding. When you cannot tell what worked, the safe move is to send everything to everyone, which produces the overload that makes the next message work less well.
Measure in three layers instead. Reach: did it arrive, and with whom. Attention: did anyone stay. This is where completion rates, dwell time and drop-off points live, and where audio and video beat every other channel, because you can see the exact minute people leave. Effect: did anything change, in sentiment, in the questions managers get asked, or in the operational number the message was about.
Moving up one layer usually costs a survey question and a conversation with whoever owns the process, not a new platform. Start with the message that matters most this quarter and measure that one properly. The channel mix will correct itself once you can see which parts of it people finish.