Social Media in Public Services: Building Audiences and Measuring Engagement
In many public bodies, social media began as a sideline of the press office. It has since become the place residents check first when a road closes, a school shuts for snow or a new online service goes live, and one of the few channels through which an organisation hears back from the people it serves in something close to real time. That makes it part of the front door to public services, and it deserves the same planning, measurement and maintenance as a website or a contact centre.
The difficulty is that social platforms reward behaviours that do not always sit comfortably in government. They favour frequency, personality and speed; public organisations are built for accuracy, accountability and caution. Reconciling the two starts with being clear about what each account is for.
Start with purpose, not platforms
A local council, a health trust and a national regulator have very different reasons to be on social media, and their accounts should reflect that. Some accounts exist mainly to push timely operational information: closures, disruption, deadlines and alerts. Others are there to build understanding of a policy area over time, to support recruitment, or to gather views during a consultation. A few are genuinely conversational, handling enquiries and complaints in public.
Each purpose points to a different mix of platforms. Facebook, especially local community groups, remains a direct route to residents on everyday matters such as bins and roads. LinkedIn suits recruitment and professional audiences, and YouTube suits explainers and recorded briefings. Instagram and TikTok reach younger residents who may never visit a council website, while X remains useful for fast-moving incident updates that journalists and partner agencies follow closely.
Trying to be everywhere usually means being thin everywhere. It is better to run two or three accounts well than six badly, and to retire accounts that no longer serve a purpose rather than leave them dormant and unanswered.
Building an audience from a standing start
New accounts face the same problem regardless of sector: content seen by almost no one generates little engagement, and content with little engagement is shown to fewer people still.
Public bodies have some natural advantages here. They can cross-promote from websites, email bulletins, printed letters and partner organisations, and they can draw on frontline staff whose personal networks are often larger than the corporate account’s. Some organisations and creators also use third-party growth services or tools to give a new account an initial visibility boost while it builds its first audience, although the quality of what is delivered varies considerably and any such approach should be checked carefully against the rules of each platform. Whatever mix of methods is used, the test is the same: whether the people following the account have a genuine interest in the area or service concerned, because that audience is what every later metric depends on.
A visible, active following also works as social proof. Residents are more likely to trust and share information from an account that already looks established, and partner organisations are more willing to amplify it during an incident or campaign.
Beyond that, the fundamentals of growth are unglamorous. Post consistently, at times when your audience is actually online. Write for each platform rather than recycling the same press release everywhere. Use plain language, captions on video and descriptive text on images so that content is accessible from the outset. And answer questions promptly, because visible responsiveness is itself a reason to follow an account.
The metrics that matter
Platform dashboards are full of numbers, and it is easy to report all of them without learning anything. Four measures form a sensible core for most public-sector accounts:
- Reach — the number of unique people who saw a piece of content. It shows whether important information is getting out, and tells you more than impressions, which count the same person several times.
- Engagement rate — interactions such as reactions, comments, shares, saves and link clicks, divided by reach or by follower count. Be explicit about which denominator you use and stick to it, because the two produce very different figures that cannot be compared.
- Follower growth — net new followers over a set period, ideally expressed as a percentage so that small and large accounts can be compared fairly. Sudden spikes and drops both usually have a cause worth understanding.
- Sentiment — whether the conversation around the account is broadly positive, neutral or negative. Automated tools are a reasonable starting point, but sarcasm and local slang trip them up, so a regular human-read sample is essential.
The most valuable measures, though, are usually outcomes rather than activity: click-throughs to an online form, fewer calls to a contact centre after a change has been well explained, more responses to a consultation, or more applications for an advertised role. Tagged links and a before-and-after comparison of call volumes are usually enough to begin with. Linking social activity to service outcomes takes effort, but it turns a communications report into evidence that the channel deserves its budget.
What good looks like
There is no universal benchmark that makes a particular engagement rate ‘good’. Rates vary by platform, by audience size and by subject: smaller accounts often record higher rates than large ones, and a post about bin collections will never perform like a post about a summer festival. The more reliable approach is to benchmark against your own history first, then against genuinely comparable accounts.
That said, healthy public-sector accounts tend to share a recognisable pattern. Reach rises sharply when it matters most — during incidents, deadlines and service changes — showing that people turn to the account when they need information. Follower growth is steady rather than spiky, and unfollows stay low after busy periods. Comment threads contain questions that have been answered and corrections where they were needed, rather than a trail of ignored complaints. Dips in sentiment are traced to a real-world cause rather than discovered weeks later, and the content is visibly shaped by data: formats that work are refined, while those that consistently fall flat are dropped.
Managing risk, tone and trust
Public accounts carry obligations that commercial accounts do not. Political impartiality in the run-up to elections, accessibility duties, records management and the handling of personal information in replies all need clear rules. A short written social media policy — covering who can post, how approvals work, how abuse is handled and when a conversation should move to a private channel — prevents most problems before they start.
Tone matters as much as policy. Overly formal accounts read like noticeboards and are scrolled past; overly casual ones can trivialise serious matters. The strongest public-sector accounts sound like a knowledgeable, helpful person who works there: warm, direct and careful with facts. Humour can work well, but never at the expense of residents and never on subjects where people are anxious or grieving.
Credibility is built in the replies as much as the posts. Audiences notice templated answers, unanswered questions and silence during a crisis; correcting an error quickly, in the same thread, does more for trust than any campaign.
Turning measurement into improvement
Measurement only pays off if it changes what the team does next. A light monthly review is usually enough: what reached the most people, what drove meaningful interaction, where sentiment moved and why, and which service outcomes the channel supported. Each quarter, ask whether every account still serves its purpose and whether the platform mix still matches the audience.
Share the findings beyond the communications team. Service managers can learn a great deal from the questions residents ask in public, and that insight is one of social media’s most under-used benefits for government. Treated as a source of evidence as well as a broadcast channel, social media fits naturally into the wider effort of building a data culture in public organisations.