Stop 01 · Product Management FoundationsTopics · 6/10

Product-Market Fit

In short

Before product-market fit, you push your product on people. After it, people pull it out of your hands. Most early products die before they ever feel that pull.

The point where a product satisfies strong market demand well enough that growth becomes pull-driven rather than push-driven — the single most important milestone for any early-stage product.

The purple blob fries samosas at a stall while a long, happy queue waits.

Think of it like this

The samosa stall with a queue

One stall begs people to try its samosas. Another has a queue before the oil is even hot, and regulars bring friends. The second stall has fit. Nobody needs convincing; the hard part is frying fast enough.

Watch it happen

The "very disappointed" survey

Very

Somewhat

Very

Not

Very

Somewhat

Not

Very

Somewhat

Not

1/4Ask active users: how would you feel if you could no longer use this product? Here are 10 answers.

The big ideas

What you need to know

Pull, not push

With fit, usage grows from word of mouth. Without it, every new user costs ads and effort.

Retention is the real test

If people keep coming back weeks later, you're onto something. A big launch spike means little alone.

Fit is for a segment

You rarely fit everyone. You fit a specific group with a specific pain, then expand from there.

Scaling too early hurts

Spending on ads before fit just buys users who leave. Find fit first, then pour fuel.

See it in code

A tiny example

excel

1=COUNTIF(B2:B101, "Very disappointed") / COUNTA(B2:B101)

Put survey answers in column B, one per row. This gives the share of users who would be very disappointed. Format the cell as a percentage.

Save yourself the pain

Common mistakes

Oops

Calling it product-market fit because the launch got 10,000 signups.

Do this instead

Signups show curiosity. Check how many still use it after a month before claiming fit.

Oops

Surveying everyone who ever signed up, including people who tried it once.

Do this instead

Survey active users who've used the product recently. Others can't judge whether they'd miss it.

Your mission

Run a mini fit survey

~30 min

Quick check

Which signal best suggests product-market fit?

Go deeper

1Learn the Sean Ellis 'very disappointed' survey test for measuring PMF.
2Study a product that clearly had it (and one that clearly didn't).
3Understand why chasing growth tactics before PMF usually backfires.