What is KPI?

KPI explained simply

Imagine you are driving at night. Your dashboard shows dozens of lights. Still, you mostly look at three things: your speed, your fuel and the road.

A KPI works the same way. It is one of the few numbers you really look at to know if your business is moving forward. KPI stands for key performance indicator.

The important word is “key”. You can measure hundreds of things. But only a few numbers tell you if you are getting closer to your goal: selling, finding customers, making money.

There are two families of numbers. Vanity metrics feel good: likes, followers, views. Business KPIs pay the bills: sales, cost per sale, revenue. A post can get lots of views and zero sales.

A concrete example

Let’s imagine Manon launches her own online bag brand. Every evening, she opens Instagram, her website stats and her ad account. She writes down everything: likes, followers, views, clicks, time spent on the site.

After one month, she has a table with 15 columns. She still doesn’t know if her business is doing well.

She decides to keep only 3 KPIs:

KPI	The question	Her number this month
Paid sales	Am I selling?	40 bags
Cost per sale (CPA)	How much does a customer cost me?	$15
Conversion rate	Does my website convince people?	2%

Where do these numbers come from? She spent $600 on ads, and 600 ÷ 40 = $15 per sale. Her website got 2,000 visits, and 40 ÷ 2,000 × 100 = 2%.

Now Manon can read her month. Each bag leaves her $25 of margin before ads. She pays $15 of ads per bag. So she has $10 left per bag, which makes 40 × 10 = $400 for the month. Her likes never told her that.

Why it matters to you

• You know if you are moving forward. A good KPI answers a simple question: am I getting closer to my goal?
• You save time. Three numbers take two minutes to read. Fifteen columns take an hour of doubt.
• You make better decisions. You cut what costs too much and keep what sells, even if it gets few likes.

KPIs also protect you from false good signs. An account that gains hundreds of followers in a week looks healthy. If none of those followers buy, your business has not moved.

How to choose and track them

1. Start from your goal. For example: “sell 60 bags per month”. A KPI without a goal is just one more number. A SMART goal helps you set it.
2. Choose 3 KPIs maximum. One for the result (paid sales), one for the cost (cost per sale), one for the path (conversion rate).
3. Define each KPI once and for all. A “sale” is a paid order, not a cart or a form. If you sell with cash on delivery, count the parcels that were delivered and paid for.
4. Always record them at the same time. Once a week is enough. A spreadsheet with one row per week does the job very well.
5. Set an alert threshold. For Manon: if the cost per sale goes above $25, she loses money on every bag. That is the signal to act.

When you run ads, the reading order matters. First, your cost per delivered sale. Next, compare this cost to your profitability limit, the Break-even CPA. Only after that, look at video and click numbers (CTR, views). They help you understand a problem. They are not there to set a goal.

Common mistakes

• ❌ Tracking 15 numbers “to be safe”. → ✅ 3 KPIs maximum at the start.
• ❌ Treating likes as a KPI. → ✅ A KPI is tied to money or customers.
• ❌ Changing the definition of a sale from one month to the next. → ✅ Write your definition down and keep it.
• ❌ Checking your KPIs every day and panicking. → ✅ One reading per week, with enough data.
• ❌ Setting a click-through rate goal. → ✅ Set a goal for sales and cost per sale. Click-through rate is for diagnosis.

With AI

Copy this prompt into your AI assistant:

My business: [business].
My goal this month: [goal with a number].
The numbers I track today: [list].
1. Keep 3 KPIs maximum: one for the result, one for the cost, one for the path.
2. Explain in one sentence why each one matters.
3. Sort the other numbers into "diagnosis" or "vanity".
4. Suggest a simple table to record them every week.

AI helps you sort your numbers. Choosing your goal and acting when a KPI turns red is your job.