The term PRD is used as if it describes a single kind of document. In practice, teams use very different types of documents depending on the size and stage of the initiative they are working on, the culture of the organisation, and the maturity of the product.
Understanding the different types of PRDs, and when each is appropriate, is one of the first practical skills to develop.
There is no universally correct format. There is only the format that best serves the situation you are in.
An exploratory PRD, sometimes called a discovery document or a product brief, is used early in the process before a solution is defined. Its purpose is not to specify a solution but to frame a problem clearly enough that a team can begin exploring one.
It captures what is known about the user's needs, the evidence that the problem is real and significant, the business context that makes solving it worth pursuing, and the open questions that must be answered before a solution can be responsibly defined.
An exploratory PRD is a question document, not an answer document.
It is particularly valuable when the problem is not yet well understood, when multiple solutions are being considered, or when significant discovery work needs to happen before requirements can be written. It gives the team permission to explore without locking in a direction prematurely.
When to use it:
Early in the product discovery phase when the problem is identified but the solution is genuinely open. When user research is ongoing and findings will materially shape the solution. When significant technical exploration is needed before requirements can be defined.
The feature PRD is the most common type and what most people mean when they say PRD. It describes a specific feature or set of related features to be added to an existing product. It defines the problem the feature solves, the user it serves, the functional requirements it must meet, and the success metrics that will indicate whether it worked.
Feature PRDs assume a product already exists and a team already knows how to build things together. They are typically scoped to a single feature or a coherent set of related capabilities that can be shipped in a defined timeframe.
A feature PRD is the workhorse document of day-to-day product management. It is the document you will write most frequently, iterate on most often, and eventually learn to write with a fluency that makes it feel natural rather than effortful.
When to use it:
An epic PRD covers a large initiative that spans multiple features, multiple teams, and often multiple quarters. It is less granular than a feature PRD and is intended to provide strategic context and directional alignment across a broad body of work.
An epic PRD typically contains the overarching problem statement and strategic rationale, the user journey or experience vision for the entire initiative, the major components of work and how they relate to each other, and the phasing logic that determines the sequence in which components will be built and shipped.
An epic PRD is a map of a long journey, not a turn-by-turn navigation guide. It is complemented by more granular feature PRDs for each component that gets built within it.
When to use it:
A technical PRD is written for initiatives where the primary deliverable is an infrastructure or platform change rather than a user-facing feature. It describes requirements from a technical perspective while still maintaining focus on the user or business need that the technical work is enabling.
Technical PRDs are often co-authored by product managers and engineering leads. They require the product manager to have enough technical fluency to understand and communicate the requirements accurately, and enough product discipline to keep the document anchored to the problem being solved rather than letting it drift into pure technical specification.
When to use it:
Remember this: The type of PRD you write should match the stage and scope of the work. An exploratory PRD before you know what you are building. A feature PRD when you do. An epic PRD when the initiative is large and spans many teams. A technical PRD when the deliverable is infrastructure rather than experience. Using the wrong type creates confusion, not clarity.