To gauge product-market fit, measure how many users return to your product after a week or 30 days, and aim to exceed industry benchmarks for retention.

Products lacking product-market fit typically see user engagement decline to zero, while those with fit will stabilize at a certain retention rate, ideally between 20-30%.

To measure product-market fit, look for retention; if users keep coming back, you're solving their problems effectively.

Retention is the most reliable way to measure product-market fit; it indicates whether users continue to find value in your product.

Using surveys to gauge product-market fit can be biased; instead, focus on measuring actual user retention.

Measuring retention is critical; if you don't have a product that retains users, you shouldn't focus on growth yet.

Setting a metric and goal for your team allows for data-driven operations, where you can monitor progress daily and adjust strategies accordingly. A low retention rate, like 6.25% after four weeks, indicates poor product-market fit; aim for at least 20-30%.

Signs of product market fit include high retention on a broken product, major brands using your SaaS product, and strong customer feedback even from a small group.

If your retention curve slopes downwards, it indicates a lack of product-market fit, regardless of initial growth metrics.