The cost of producing almost anything online has fallen close to zero. Text, design, code, and media can be generated in seconds at a quality that clears the bar for acceptable. When production becomes that cheap, value moves to what stays scarce: reaching the right people, earning their trust, knowing what to make, and understanding a specific audience better than a general tool can.
Most guidance on starting an online business predates this change. This guide is built on it. Every chapter proceeds from the same starting point: what is now abundant, and what is not.