Sales Loves MarketingWe need product documentation because customers want to solve problems on their own, at the moment they get stuck. Good documentation lets them set up and use your product without waiting for support, and it makes your support, sales and onboarding teams faster too.
It is not an afterthought to write once the product ships. For most SaaS and B2B products, the documentation is part of the product experience.
For the developer-facing side, read our companion post on why technical documentation is important.
What is product documentation?
Product documentation is any content that helps people understand, set up and use a product. It usually lives in a help centre or knowledge base and includes:
- Getting-started guides and onboarding checklists
- How-to articles for specific tasks
- Reference pages: settings, limits, integrations, keyboard shortcuts
- FAQs and troubleshooting articles
- Release notes and changelogs
- Videos, screenshots and interactive walkthroughs
What are the four types of product documentation?
The Diátaxis framework, a systematic approach to documentation, splits it into four kinds, each with a different job:
| Type | Purpose | Example |
|---|---|---|
| Tutorials | Teach a beginner by doing | "Build your first campaign in 10 steps" |
| How-to guides | Help a competent user finish a specific task | "How to connect your CRM" |
| Reference | List the facts users look up | "All plan limits and API fields" |
| Explanation | Give background and the reasons behind things | "How lead scoring works" |
Mixing these is a common reason documentation feels confusing. A how-to guide padded with background, or a tutorial that turns into a reference table, serves nobody well.
Why do businesses need product documentation?
It reduces repeat support questions
When customers can find answers themselves, your support team spends less time on the same basic questions and more time on the hard cases. Every new support ticket that a docs article could have answered is a sign of a gap to fill.
It speeds up onboarding
The sooner new customers get value from the product, the sooner they see why they bought it. Clear getting-started guides help them configure the product, invite their team and complete the first important task without a call.
It helps sales close deals
Buyers evaluating B2B software may read your documentation before they buy, to check whether the product supports their integrations, security needs and workflows. Public docs answer those questions early. Sales teams can also send a specific article instead of writing the same explanation again. Good documentation is a sales enablement asset.
It brings in search traffic
Help centre articles answer specific questions, such as "how to export contacts from X", that people type into search engines and AI assistants. Well-structured, public documentation can rank for those searches and introduce your product to people comparing tools.
It protects knowledge inside the company
Writing down how the product works keeps that knowledge from living only in the heads of a few engineers or support staff.
Why do customers need product documentation?
- To get value faster. They bought the product for a reason. Docs show them how to reach it.
- To discover more of the product. Most customers start with one feature. Documentation shows them what else it can do.
- To save time. Searching a help centre is faster than opening a ticket and waiting for a reply.
- To trust the product. Clear, current docs signal that the company cares about its customers after the sale.
What makes good product documentation?
It is easy to find
Link to it from inside the product, from your website navigation and from support replies. Add search to your help centre, and use the words customers use, not internal feature names.
It is written for the reader
Google's developer documentation style guide sums up many of the habits that make docs readable:
- Address the reader as "you"
- Use active voice, so it is clear who does what
- Put conditions before instructions ("If you use SSO, click...")
- Use numbered lists for steps and bulleted lists for everything else
- Use descriptive link text instead of "click here"
Write for the least experienced likely reader and avoid jargon, or explain it the first time you use it.
It is visual where that helps
Screenshots, short videos and diagrams explain interfaces faster than text. Give every image alt text, and keep screenshots current, because an outdated screenshot makes readers doubt the whole article.
It is accessible
Your help centre is part of your website, so follow the W3C's Web Content Accessibility Guidelines. WCAG 2.2 is the current version. Read our post on web accessibility for the basics.
It is up to date
Documentation that describes last year's interface is worse than none. Make updating the docs part of releasing a feature, not a task for later.
How do you create product documentation?
- List the questions. Pull the most common questions from support tickets, sales calls and onboarding sessions.
- Pick the type for each. Decide whether each topic is a tutorial, a how-to guide, a reference page or an explanation.
- Write a template per type. Templates keep articles consistent and faster to write.
- Choose a home. Use a help centre or knowledge base tool, or follow a "docs as code" approach. Write the Docs describes this as writing documentation with the same tools as code: version control, plain-text markup, reviews and automated tests.
- Review with real users. Watch someone follow a guide. Where they hesitate, the doc needs work.
- Measure and improve. Track article searches with no results, low-rated articles and topics that still create tickets.
AI writing tools can help draft articles and summarise release notes, but a person who knows the product should check every step. Our guide to AI tools in marketing and sales covers where they help and where they need checking.
The short version
Product documentation turns your product's knowledge into something customers can use without asking. Treat it as part of the product, give it an owner, and update it every time the product changes. If you are planning a release, pair this with our guide to launching a new product and our post on product requirement documents.
Frequently asked questions
What is product documentation?
Product documentation is any content that helps people understand, set up and use a product. It includes getting-started guides, how-to articles, reference material, FAQs, release notes and manuals, usually published in a help centre or knowledge base.
What is the difference between product documentation and technical documentation?
Product documentation is written for the people who use the product, such as customers and admins. Technical documentation is a wider term that also covers internal and developer material, such as API references, architecture notes and requirement documents.
What are the main types of product documentation?
A common way to organise it is the Diátaxis framework, which splits documentation into four kinds. Tutorials teach a beginner by doing, how-to guides solve a specific task, reference pages list the facts, and explanations give background and the reasons behind things.
Who should own product documentation?
It depends on the company. Technical writers, product managers, support teams and product marketing all contribute. What matters most is one clear owner who makes sure every product change is reflected in the docs before or when it ships.