How to evaluate Product-Market Fit in an internet business?

Approach:
Evaluating Product-Market Fit (PMF) involves a combination of qualitative and quantitative analysis. The goal is to understand if your product truly satisfies a market need in a sustainable way.



Here's how to assess it -- starting with the leading indicators, moving to input metric measures, and finally to the output metric:


1. Customer Feedback:
Gather feedback from your users. Are they satisfied? Would they feel a significant loss if your product disappeared tomorrow? A high Net Promoter Score (NPS) is also a strong sign that customers value your product highly.

Tools like surveys and interviews can be insightful, especially questions around user satisfaction and product dependency.


2. Usage Metrics:
Look at user interaction with your product. High levels of user engagement, repeat usage, and growing user base are strong indicators of PMF. Metrics like daily active users (DAUs), session length, and frequency of use are critical.


3. Growth Metrics:
Organic growth metrics such as word-of-mouth referrals, organic downloads, and customer testimonials are powerful indicators of PMF.


4. Financial Indicators:
Check the unit economics. Are the customers bringing in more revenue over their lifecycle than the cost to acquire them? Positive unit & customer economics are the ultimate validation of PMF.




Conclusion:
Evaluating PMF is not a one-time process but a continuous one. It requires looking at a mix of qualitative and quantitative data to understand the depth and sustainability of your market fit.