PostEaseThe short answer
The metrics that matter are the ones that show whether people valued a post: reach (how many different people saw it), shares and saves (whether they found it worth passing on or keeping), watch time or completion (whether they stayed), and clicks (whether they acted). Follower count, likes and raw views matter less, because they can rise while the content gets worse.
Judge each number against your own recent posts, not someone else’s benchmark. The middle value of your last 20 or 30 posts, the median, is the fairest baseline: one viral post cannot drag it up.
The metrics, from most to least useful
Each metric answers one question. The useful ones answer a question you can act on.
| Metric | What it tells you | Act on it? |
|---|---|---|
| Shares and sends | People found it worth passing to someone | Yes: make more of what gets shared |
| Saves | People wanted to come back to it | Yes: a sign of useful, reference content |
| Watch time and completion | People stayed, and where they left | Yes: fix the opening or the slow part |
| Reach | How many different people saw it | Yes, against your own median |
| Clicks | People acted on the link | Yes, if the post has a link |
| Comments | People had something to say | Sometimes: read them, do not only count them |
| Engagement rate | The share of people reached who reacted | Yes, with one formula, kept the same |
| Likes | A quick reaction, the cheapest one | Rarely on its own |
| Views or impressions | How often it was shown, repeats included | Rarely on its own |
| Follower count | How many people once chose to follow | No: watch growth per post instead |
What the platforms say they look at
The best guide to which numbers matter is what the platforms themselves reward. Instagram says its most important Reels predictions are whether a viewer will reshare, watch to the end, like, and open the audio page. YouTube says it weighs watch time, by how much viewers valued it, and satisfaction surveys, not views alone. TikTok has named finishing a longer video as a strong signal of interest. None of them say follower count is how they decide what to show.
Why views and followers mislead
Views can climb while attention falls. Metricool’s 2026 study of 799,718 YouTube videos found Shorts views rose more than 127% on the year before, while average view duration per Short fell about 67%, to roughly 16 seconds. A channel watching views alone would think it was thriving.
Follower count misleads in another way: the share of followers who see each post shrinks as an account grows. In Socialinsider’s 2026 study of brand accounts, Instagram accounts with 1,000 to 5,000 followers reached about 6.65% of them per post, and accounts with 100,000 to 1 million reached about 3.5%. More followers did not mean a proportionally larger audience for each post.
Engagement rate: useful, if the formula is stated
Engagement rate is the most quoted metric and the most misread, because it can be divided by reach, impressions or followers, and each gives a different answer. Buffer’s 2026 engagement report divides by reach and puts Instagram’s median at about 5.5%; its earlier article divided by impressions and put Instagram at about 1.2%. The account did not change; the formula did. Pick one, write it down, and compare only like with like.
Native numbers beat estimates
A platform reporting its own numbers through its API is the accurate source; a tool estimating them from public data is guessing at what the platform already knows. Reach, saves, shares and watch time are mostly private to the account, so a tool that does not connect to it cannot see them at all. Prefer the platform’s figure, dated, whenever you have it.
A monthly review in four steps
Once a month, for each platform:
- List the month’s posts with reach, shares, saves and, for video, average watch time.
- Find your median for each, and mark the posts well above and well below it.
- Look for what the posts above have in common: topic, format, opening, length.
- Make more of that next month, and compare the medians again.
Questions
What is the most important social media metric?
There is no single one, but shares and watch time come closest, because they show people valued a post and they are what platforms like Instagram and YouTube say they weigh.
What are vanity metrics?
Numbers that look good but do not tell you what to do next, such as follower count, likes and raw views on their own. They can rise while the content gets worse.
Should I compare my metrics with industry benchmarks?
Only as a rough guide. Compare each post with your own recent median first; it accounts for your niche, size and platform, which a benchmark does not.
Is reach or engagement more important?
Both, for different questions. Reach says how many people saw a post; engagement says how many of them cared. Divide engagements by reach to see both at once.
Sources
- Metricool, YouTube trends 2026: what 799,718 videos tell us about views, Shorts, and watch time, July 2026.
- Socialinsider, Social media reach has a 14% YoY decrease on Instagram, September 2026.
- Buffer, The state of social media engagement in 2026, March 2026.
- Instagram, Instagram ranking explained, May 2023.
- YouTube, On YouTube’s recommendation system, September 2021.
- TikTok, How TikTok recommends videos #ForYou, June 2020.