• In the introduction to this series, I explained there are two types of companies: Tugboats, where growth feels like you have to put a ton of fuel in to get only a little speed out, and Smooth Sailors, where growth feels like wind is at your back. The difference between these two are not the common mantras of build a great product, product market fit is the only thing that matters, or growth hacking.
• In part two, I talked about why we should think about Product Market Fit as Market Product Fit, how to lay out your Market and Product hypotheses, and how understanding whether you have Market Product Fit comes down to Qualitative, Quantitative, and Intuitive indicators.
• In part three, I covered Product Channel Fit - that products are built to fit with channels, channels are not built to fit with products.  

Which brings us to part four, Channel Model Fit.

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