The essentials
- Ten metrics: reach, reach rate, engagement rate by reach, qualified engagement, click-through rate, social sessions, attributed conversions, net growth, response time, share of video watched.
- 2026 benchmarks: reach rate of 2 to 5% of followers on Facebook, 4 to 9% on Instagram, 5 to 10% on LinkedIn; engagement by reach of 3 to 8% on Instagram, 2 to 5% on Facebook.
- Results: click-through rate of 0.5 to 2% on posts with a link; social sessions generally convert less than search, hence the importance of attribution.
- How to read it: each KPI is read against its own 90-day series and against the benchmark for its network; never one network against another.
SMO KPIs measure the performance of an organic presence on social media, without advertising. This page keeps ten of them, with the formula to use and the 2026 reference values network by network, taken from the annual studies of social tool publishers (Socialinsider, Rival IQ, Hootsuite, Metricool) and from observations on SME accounts. These benchmarks situate an account; they do not replace the account's own historical series. How to select two or three of these metrics according to the objective is covered in choosing your KPIs according to the objective.
Distribution KPIs
| KPI | Formula | 2026 benchmarks | What it reveals |
|---|---|---|---|
| Reach per post | Unique accounts that saw the post (average and median over 30 days) | Specific to each account; track the median | The content's ability to be distributed |
| Reach rate | Average reach / followers | Facebook 2 to 5%; Instagram 4 to 9%; LinkedIn page 5 to 10%; TikTok not relevant (distribution beyond followers) | The account's health with regard to the algorithm |
| Share of reach beyond followers | Non-follower reach / total reach | Reels 30 to 60%; TikTok 60 to 90%; LinkedIn 20 to 50%; Facebook feed 10 to 30% | The ability to reach new people |
| Cumulative monthly reach | Sum of accounts reached over the month (native) | Track the trend | Awareness generated |
Organic reach and its orders of magnitude, detailed by network, are described in organic reach: definition and figures.
Engagement KPIs
- Engagement rate by reach: interactions / reach. 2026 benchmarks: Instagram 3 to 8%, Facebook 2 to 5%, TikTok 5 to 10% (per view), LinkedIn 2 to 4% per impression, X 1 to 2% per impression. This is the content quality metric.
- Engagement rate by followers: interactions / followers. Benchmarks: Instagram 0.4 to 0.7%, Facebook 0.1 to 0.2%, TikTok 2 to 3%, X 0.03 to 0.05%. Used to compare accounts, including competitors.
- Qualified engagement: comments + shares + saves, in absolute value and as a share of total engagement. A healthy account exceeds 20 to 30% qualified engagement on Instagram and LinkedIn.
- Video view rate: 3-second views / reach, and share of complete views. Benchmarks: more than 50% at 3 seconds, 25 to 35% complete views over 30 seconds.
Definitions and calculation pitfalls are in engagement: definition, calculation and 2026 rates.
Result KPIs
| KPI | Formula and source | 2026 benchmarks | Related decision |
|---|---|---|---|
| Click-through rate | Link clicks / reach (native); only to be calculated on posts with a link | 0.5 to 2%; up to 3 to 5% in a story with a link for an engaged audience | Review the call to action and the placement of the link |
| Social sessions | GA4 sessions with medium = social (UTM) or the “Organic Social” channel | Track the trend; often 5 to 15% of the traffic of an active SME | Increase posts with a link, stories with a link |
| Engagement rate of social sessions | Engaged sessions / sessions (GA4) | Generally 10 to 20 points lower than organic search | Adapt the landing page to the mobile context |
| Attributed conversions | GA4 key events attributed to social + CRM reconciliation | Conversion rate of social sessions often 0.5 to 2% in B2B, 1 to 3% in e-commerce | Judge the return on the effort; adjust the targets |
| Cost per social lead | Total monthly cost (time + provider + tools) / attributed leads | To be compared with the company's other channels | Arbitrate the budget between channels |
Measurement on the site side relies on tagged links and declared conversion events; the setup is described in social conversions in GA4. Without that foundation, result KPIs do not exist and management is limited to distribution.
Relationship and community KPIs
- Net follower growth: new followers minus unfollows, per month. Benchmark: 1 to 3% per month for an active SME account; also look at the share of followers within the geographic or professional target.
- Median response time: the time between a comment or a message and the reply. Target: under 24 working hours; under 2 hours for sales questions during the day.
- Response rate: comments and messages answered / received. Target: 80% and above (excluding spam).
- Mentions and customer-generated content: monthly volume of mentions, reviews and spontaneous shares; a metric of real awareness.
Reading the KPIs together
An isolated KPI lends itself to any interpretation; it is their combination that speaks. A few common cross-readings:
- Reach rising, engagement by reach falling: the content is reaching people outside the target (trend, broad hashtags); refocus the topics.
- High engagement, low clicks: the content is liked but calls for nothing; add a call to action and a link in a story or in a comment.
- Decent clicks, no conversions: the landing page does not deliver on its promise on mobile; fix the page before producing more.
- Followers rising, reach flat: the new followers are not seeing the posts; check where they came from (competition, off-target audience).
- Everything falling at once: check the posting rhythm first, then the formats, before blaming the platform; the approach is in analysing your social performance.
The monthly dashboard fits on one page: the two main KPIs tied to the objectives, four to six diagnostic metrics, each with its value for the month, its 90-day median and its network benchmark.
How GreenRed helps
Rather than juggling several tools, the GreenRed 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
Which KPI is the most important in SMO?
It depends on the objective: reach for awareness, engagement by reach for consideration, sessions and attributed conversions in GA4 for traffic and leads. The engagement rate by reach is the most universal because it measures content quality and predicts the distribution of the following posts.
What are the reference values for organic reach in 2026?
Related to followers, the average reach of a post sits at around 2 to 5% on Facebook, 4 to 9% on Instagram and 5 to 10% for a LinkedIn page. On TikTok, reach does not depend on followers and is read as the share of views coming from non-followers, often 60 to 90%.
How do you measure conversions coming from social media?
Tag every outbound link with UTM parameters (source = network, medium = social), declare the key events in GA4 (form, call, appointment, purchase) and read the acquisition report by source and campaign. Complete it with the CRM to find out the value of signed leads and with a “how did you hear about us” question.
Should you compare your KPIs with those of competitors?
Yes for engagement by followers, rhythm and formats, which are publicly visible, in order to situate the account. No for reach and clicks, which are invisible from the outside. The most useful comparison remains that of the account with its own 90-day series, with a constant formula.