This comprehensive guide covers key aspects of identifying, measuring, and validating product-market fit for digital products. It dives into essential topics, including determining product-market fit across industries, understanding buyer behavior, setting product-market fit goals, and running product experiments. The article also explores quantitative metrics to assess product-market fit, the importance of market size, growth rate, and customer base, and the concept of the product-market fit pyramid. By following this guide, new and experienced Product Managers can develop data-driven strategies and create successful digital products that meet customer needs and stand out in the market.