The essentials
- The rule: one objective, one main KPI and two diagnostic metrics; beyond six metrics tracked, nobody decides anything from the figures any more.
- Matrix: awareness = reach and views; consideration = engagement by reach and saves; traffic = clicks and GA4 sessions; enquiries = attributed conversions; recruitment = applications.
- To set aside as a main KPI: the follower count, raw impressions, likes: useful in context, misleading for steering.
- Target: set from the value of the last 90 days, plus 20 to 50% at six months depending on the effort committed, never from a benchmark alone.
The platforms provide dozens of metrics; the problem is not having too few but choosing three. A KPI is a metric that triggers a decision: if reading it changes nothing about what you do the following week, it is not a KPI but a statistic. This page gives the method for linking each objective to its metrics, setting aside the metrics that flatter without informing, and setting defensible targets. The 2026 reference values by metric are detailed separately in the benchmark SMO KPIs.
Start from the objective, never from the platform
The choice of metrics starts with the question: what is social media for in this business? The usual answers fall into five objectives, which correspond to the stages of the customer journey. Each objective has a main KPI (the one that judges the result) and diagnostic metrics (the ones that explain why it rises or falls). The method for framing the objective itself is in setting realistic SMO objectives.
| Objective | Main KPI | Diagnostic metrics | Source |
|---|---|---|---|
| Awareness | Monthly reach (unique accounts reached) | Share of reach outside followers, 3-second video views, shares | Native statistics |
| Consideration | Engagement rate by reach | Saves, comments, watch time, profile visits | Native statistics |
| Traffic | GA4 sessions from organic social | Link clicks, click-through rate, pages viewed per session | GA4 + UTM |
| Enquiries and sales | Conversions attributed to social (quotes, sign-ups, sales) | Conversion rate of social sessions, cost per enquiry if paid promotion | GA4 + CRM |
| Recruitment | Applications coming from social media | Careers page visits, LinkedIn page followers, engagement on job posts | LinkedIn + website + ATS |
| Customer relations | Median response time to messages and comments | Volume of enquiries, response rate, sentiment | Unified inbox |
An SME keeps two objectives, so two main KPIs and four to six diagnostic metrics in total. This ceiling is not an affectation: it determines whether the dashboard is actually read.
The metrics to set aside as a main KPI
Some metrics are everywhere because they are easy to read and rise naturally. They have their place in context, never for steering:
- The follower count: it measures neither real reach (2 to 10% of followers see a post in 2026) nor the quality of the audience. Track net growth and the share of followers in your area or your target instead.
- Impressions: they count displays, not people; one person can generate five. Prefer reach.
- Likes on their own: the least engaging interaction and the one that weighs least in the algorithms. Count them in overall engagement but look separately at comments, shares and saves.
- The engagement rate by followers: useful for comparing accounts, but it falls mechanically as the audience grows; to steer content, use the rate by reach.
The mechanism behind these misleading metrics is described in vanity KPIs and the associated reading mistakes in the mistakes in interpreting KPIs.
Setting a defensible target
A target is built in three steps:
- Measure the starting point over 90 days with the formula you will keep afterwards (example: engagement by reach = total interactions / reach, per post, then averaged).
- Apply a progression proportionate to the effort: +20% at six months if the pace and the formats do not change, +50% if you introduce video and an editorial line, more than that only with paid promotion.
- Compare with the benchmark to check plausibility, not to set the target: an account at 0.3% engagement by followers on Instagram will not aim for 3% in six months even if the best accounts are there.
| Example: services SME, enquiries objective | Starting point (90 days) | Target at 6 months | Decision if not reached |
|---|---|---|---|
| Quote requests attributed to social | 4 / month | 8 / month | Review the landing page and the call to action |
| Organic social GA4 sessions | 180 / month | 350 / month | Increase the posts with a link, test stories with a link |
| Engagement rate by reach | 3,2 % | 4,5 % | More video and carousels, fewer offer visuals |
| Monthly reach | 9 000 | 15 000 | Pace, native formats, collaborations |
The “decision” column is the most important: it proves that the metric is actionable. If you do not know what to write in it, the metric is not a KPI.
Equipping the measurement so the figures are reliable
- Tag all outbound links with consistent UTMs (source = network, medium = social, campaign = pillar or campaign); the convention is described in source, medium and UTM.
- Declare the key events (form, call, appointment booking) in GA4 so that “enquiries attributed to social” is readable without reprocessing.
- Set the formula for each metric in writing and do not change it during the year; a change of definition makes any series unusable.
- Bring the social networks and GA4 together in a single monthly dashboard, with the starting point, the target and the value for the month.
Social KPIs form part of the company’s overall marketing dashboard; how they fit with the other channels is covered in KPIs and dashboard.
Reviewing your KPIs without changing them every month
A set of KPIs is reviewed on two occasions: when the objective changes (moving from awareness to enquiries after a year of building an audience) and when a metric has not triggered a single decision for a quarter. Otherwise, stability comes first: the value of a KPI comes from its series over time. An annual review is enough for an SME, with an adjustment of the targets every six months.
How GreenRed helps
Rather than juggling several tools, GreenRed’s Social media tracking module brings these metrics together in a single dashboard, compares them over time and tells you which actions come first. You can try it free, with no card, from the Pricing.
Frequently asked questions
How many KPIs should you track on social media?
Two main KPIs, one per objective chosen, and four to six diagnostic metrics that explain their variations. Beyond that, the dashboard stops being read and decisions are no longer based on the figures. The other metrics remain available in the tools for one-off analysis.
Is the follower count a bad metric?
It is a context metric, not a performance one. It says neither how many people see your posts nor whether they match your target. Track net monthly growth and the make-up of the audience, but judge the result on reach, engagement by reach, traffic and enquiries.
Do you need different KPIs for each network?
The same families of metrics apply everywhere, but the reference values and the native formulas differ. Set a common formula (engagement by reach, clicks, attributed conversions) and read each network against its own series and its own benchmark, without comparing a LinkedIn rate to an Instagram rate.
How do you link a social KPI to revenue?
Through attribution: links tagged with UTMs, conversion events declared in GA4, then matching with the CRM to find the value of the signed quotes that came from social. Attribution remains partial (brand searches, word of mouth); complete it with a “how did you hear about us” question in your forms.