When most developers think about documentation, they think about a necessary evil. Something you write after the code is done, grudgingly, because customers expect it. A chore that takes time away from building features.
This is a missed opportunity of epic proportions. Done right, your documentation is one of the most powerful marketing tools you have. It’s the first place potential customers go when evaluating your product. It’s where existing customers discover features they didn’t know about. And it’s the primary tool for reducing support burden, which directly improves your margins.
This guide covers how to write documentation that doesn’t just explain your plugin — it sells it.
Why Documentation Is Marketing
When a potential customer is deciding between your plugin and a competitor, they’ll compare three things: features, pricing, and documentation. The quality of your documentation signals the quality of your product. Bad docs = bad product. Good docs = professional product.
Documentation also directly impacts your conversion rate. A prospect who can quickly find the answer to “does it do X?” in your documentation is far more likely to buy than one who has to email support and wait for a response. Your docs are your 24/7 salesperson, and they work for free.
The Documentation Structure That Works
A well-structured documentation site has four sections. Each serves a different audience and purpose.
1. Getting Started Guide
This is the most important page in your docs. It should take a new user from installation to their first success in under 5 minutes. Screenshots at every step. Minimal text. The goal is not to explain everything — it’s to get them to the “aha moment” as fast as possible.
Include: installation instructions, configuration steps, and a walkthrough of the core feature. Every step should have a screenshot or short video. If your getting started guide takes more than 10 steps, simplify your setup process.
2. How-To Guides
These are task-based guides that solve specific problems. “How to create a recurring booking calendar,” “How to set up automated email reminders,” “How to integrate with Mailchimp.” Each guide should be self-contained — the user should be able to follow it without reading anything else.
How-to guides are your SEO goldmine. Each one targets a specific long-tail keyword and captures search traffic from people looking for exactly that solution. Over time, these guides will drive more organic traffic than your marketing blog.
3. Reference / API Documentation
For technical users who want to understand every option, setting, and integration. This is your comprehensive reference. It doesn’t need to be pretty — it needs to be complete and accurate. If your plugin has a REST API, this section should include every endpoint with request/response examples.
4. FAQ / Troubleshooting
The most commonly asked questions and their answers. This is your support deflection tool. Every time you answer a support ticket, add the answer to this section. Over time, it becomes a comprehensive resource that dramatically reduces your support volume.
Writing Documentation That Sells
The difference between documentation that merely informs and documentation that sells is subtle but important. Here are the techniques that convert readers into buyers:
- Use benefit-oriented headings. Instead of “Calendar Settings,” use “Customize Your Calendar to Match Your Brand.” Instead of “Email Templates,” use “Send Professional Booking Confirmations Automatically.”
- Feature the premium version contextually. When describing a feature that’s only available in Pro, don’t just say “Pro feature.”> Say “With Pro, you can also send automated reminders — upgrading takes 30 seconds.”
- Include comparison tables. A page that compares free vs. pro features, organized by use case, is one of the highest-converting pages on your site.
- Use screenshots and screencasts. A 30-second video showing your plugin in action is worth more than 1,000 words of description. Show the interface, show the result, show the value.
- Write for the skimmer. Most documentation readers don’t read — they scan. Use short paragraphs, clear headings, bullet points, and bold text for key information.
Documentation and SEO
Your documentation pages can be your best-performing SEO content. Here’s why: documentation naturally matches search intent. When someone searches “how to connect [Plugin] to Zapier,” a documentation page that answers exactly that question is exactly what they want.
To optimize your docs for search:
- Use descriptive URLs that include the feature name
- Write unique meta descriptions for each doc page
- Use heading tags (H1, H2, H3) with relevant keywords
- Include internal links between related doc pages and to your pricing page
- Structure your FAQ with proper schema markup for featured snippets
Tools for Documentation
You don’t need to build a documentation platform from scratch. These tools work well for plugin documentation:
- Documenter — A WordPress plugin specifically for creating documentation on your own site. Free and integrates with your existing setup.
- ReadMe — Hosted documentation platform with excellent API reference features. Good dev experience.
- GitBook — Clean, modern documentation platform. Good for both public docs and internal knowledge bases.
- Notion — Simple and effective, though not ideal for public-facing documentation.
- WP Knowledgebase — Another WordPress plugin option for documentation and FAQ on your existing site.
The Documentation Feedback Loop
Your support tickets are your best source of documentation improvements. Every time a customer asks a question that’s answered in your docs, your documentation failed — either it’s not clear enough, not findable enough, or not complete enough.
Create a process: once a week, review new support tickets. For each question that’s answered in your docs, improve the relevant page. For each question that isn’t answered, add a new page or update an existing one. Over time, this dramatically reduces your support burden and improves your documentation quality.
The Bottom Line
Documentation is an investment that pays for itself many times over. It reduces support tickets, improves conversion rates, drives organic traffic, and signals professionalism to potential customers. Every hour you spend improving your documentation saves you ten hours of future support and generates more revenue than you’d expect.
Write your docs as if they’re the only thing your potential customer will see — because often, they are.