Recap

1. A PRD describes what needs to be built and why, not how it should be built. The moment it crosses into the how, it has stopped being a requirements document and started undermining the expertise of the people whose job it is to answer that question.

1. A PRD serves three simultaneous purposes. It is a thinking framework that forces clarity before development begins. It is an alignment tool that gives everyone a shared reference. And it is a decision record that captures how understanding evolved and why.

1. Different situations call for different types of PRDs. Exploratory PRDs frame problems before solutions exist. Feature PRDs specify what a defined feature needs to do. Epic PRDs provide strategic orientation for large multi-team initiatives. Technical PRDs describe infrastructure and platform requirements. Using the right type for the right situation is the first practical skill to develop.

1. The four misconceptions to leave behind permanently: a PRD is not a contract, longer is not better, it is not only for engineering, it does not replace conversation, and it does not become useless when development begins.

1. What you have learned in this module is the foundation every subsequent module will build on. The structure of a PRD, how to write problem statements that are honest and specific, how to define requirements that are clear without being prescriptive, how to define success in terms that connect model metrics to business outcomes: all of that comes next.

1. This knowledge does not make you a PRD writer. It makes you a product thinker who understands why the document exists, what it is trying to accomplish, and what habits of mind are required to make it genuinely useful rather than merely present.

That distinction is where everything else begins.