Measuring Success: Key Metrics
Numbers tell you what is working. The big three are reach, impressions, and engagement rate.
What you will learn
- Define reach, impressions and engagement
- Calculate engagement rate step by step
- Focus on the metrics that actually matter
Why measure at all?
If you do not look at the numbers, you are guessing. Metrics (the numbers in your account) tell you which posts people loved and which fell flat — so you can do more of what works. You do not need many; a few key ones are enough.
The words you must know
| Metric | What it means | Plain example |
|---|---|---|
| Reach | How many different people saw it | 800 people saw the post |
| Impressions | Total times it was shown (repeats count) | Shown 1,000 times total |
| Engagement | Likes + comments + shares + saves | 50 people interacted |
| Followers | People who chose to follow you | Grew by 12 this week |
The key difference: reach counts people, impressions count views (the same person seeing it twice = 1 reach but 2 impressions).
Engagement rate, step by step
The single most useful number is engagement rate — what share of the people who saw your post actually interacted. Here is the formula and a worked example for a bakery post:
Engagement rate = (engagements / reach) x 100
A bakery Reel got:
likes + comments + shares + saves = 90 engagements
reach (people who saw it) = 1,500 people
Engagement rate = (90 / 1500) x 100
= 0.06 x 100
= 6%Note: Read it slowly: we add up every interaction (90), divide by how many people saw it (1,500), and multiply by 100 to get a percentage. The answer, 6%, means 6 out of every 100 people who saw the Reel did something with it. That is a strong result — many posts sit around 1-3%.
One more useful number: CTR
If your goal is to send people to a website or shop, watch your CTR (CTR = click-through rate) — the share of people who saw your post and actually clicked the link. It uses the same divide-and-times-100 idea as engagement rate:
CTR (click-through rate) = (clicks / reach) x 100
A bakery Story with a website link got:
clicks on the link = 45
reach (people who saw it) = 900
CTR = (45 / 900) x 100
= 0.05 x 100
= 5%Note: CTR answers a sharper question than engagement: not just did people react, but did they take the action you wanted (a click). Here 5 out of every 100 viewers clicked through to the website. Engagement rate measures interest; CTR measures intent to act — track whichever matches your goal.
Focus on the right numbers
- A small account with high engagement is healthier than a big account that nobody interacts with.
- Watch saves and shares — they often matter more than likes.
- Track the number tied to your goal (orders, website clicks), not just vanity likes.
Tip: Do not chase vanity metrics (huge follower counts that do nothing). A loyal, engaged audience of 500 can drive more sales than 50,000 silent followers. Engagement beats size.
Watch out: One viral post does not mean success. If those new viewers never engage again or buy anything, the spike is just a number. Always tie metrics back to your real goal.
Q. A post reached 2,000 people and got 100 total engagements. What is the engagement rate?
✍️ Practice
- Calculate the engagement rate for a post with 60 engagements and 1,200 reach.
- Explain the difference between reach and impressions in your own words.
🏠 Homework
- Pick any business idea and write down the ONE metric that best matches its goal, and explain why that number matters most.