How to Write PRDs for Product Managers
What Is a PRD
The Document That Bridges the Gap
There is always a gap in product development. On one side sits the idea: the vision, the user need, the business opportunity. On the other side sits the built thing: the feature, the product, the system that engineering has constructed and design has shaped. Getting from one side to the other in a way that preserves intent, aligns people, and produces something worth shipping requires a structured act of communication.
A Product Requirements Document, or PRD, is that act of communication in written form.
At its most fundamental level, a PRD is a document that describes what a product or feature needs to do, why it needs to do it, who it is for, and what success looks like when it is done. It is written by the product manager, informed by research, strategy, and stakeholder input, and used by the team to align on what they are building before they build it.
Notice what that definition does not include. It does not say a PRD describes how something will be built. That is the domain of engineering. It does not say a PRD describes how something will look. That is the domain of design. A PRD describes the what and the why. The how belongs to the people whose craft it is to answer that question.
This distinction matters more than it might seem. Product managers who write PRDs that stray into the how, who dictate implementation details or prescribe interface decisions before the right people have weighed in, undermine the very collaboration the document is supposed to enable. A PRD that tells engineers how to build something is not a requirements document. It is a poorly written technical specification that arrived by the wrong route.
What a PRD Actually Contains
Different organisations format PRDs differently. Some are long and structured. Some are brief and flexible. Some live in Confluence, some in Notion, some in Google Docs, some in purpose-built product management tools. The format varies. The core content, at its most essential, does not.
Every PRD, regardless of format, must answer six questions.
What problem are we solving? This is the foundation everything else rests on. A PRD without a clearly articulated problem statement is a solution searching for a justification. The problem statement must be specific, grounded in evidence, and written in terms of user experience rather than business desire.
Who has this problem? The target user or user segment for the feature must be clearly defined. A feature designed for everyone is designed for no one. The more specifically you can describe who you are building for, the more useful the PRD becomes as a guide for every decision that follows.
Why does solving this problem matter now? This is the strategic context: the business rationale, the competitive landscape, the user research findings, the metric that is suffering, the opportunity that will close if not acted on. It answers the question that every engineer, designer, and stakeholder will silently ask when they read the document: why are we doing this?
What does the solution need to do? These are the requirements: the functional capabilities the product must have, the behaviours it must exhibit, the constraints it must respect. This is the core of the document and the section that requires the most precision.
What does success look like? Without a defined measure of success, you cannot know whether you built the right thing. The PRD must specify the metrics that will indicate whether the feature is achieving its intended purpose, and what the target improvement looks like.
What are we explicitly not building? The scope section, and specifically the out-of-scope section, is one of the most undervalued parts of any PRD. Stating clearly what the current version does not include prevents scope creep, manages stakeholder expectations, and gives the team permission to focus.
Remember this: A PRD answers what, why, and for whom. It does not answer how. The moment a PRD starts prescribing implementation decisions, it has crossed a boundary that erodes trust and limits the contribution of the people whose expertise lies in answering those questions.