Product-market fit occurs when a company addresses a good market (large, monetizable) with a differentiated product (unique, compelling) that can satisfy a specific market segment’s needs.
The value hypothesis (the insight)
The implementation (the product)
The growth hypothesis (the go-to-market strategy)
The Unusual Ventures Field Guide is the place to start if you're starting a company. It has many examples, frameworks, and case studies that really help you apply it to the business you're trying to build. When we started Dopt, we literally had some of these guides pinned to our browser as we were going through some of the initial phases of the company.