A subject matter expert combines specialized knowledge, practical experience, and the ability to explain a particular topic clearly. Expertise can be narrow: a web developer, framework contributor, blogger, podcast host, or conference speaker may qualify. section 12.0 section 12.6
Recognize credible subject-matter expertise by checking whether someone can:
- Contribute distinctive experiences, context, examples, and commentary rather than reproduce generic material. section 4.6.3
- Advance readers’ understanding with enough technical detail to teach something new. section 4.6.3
- Explain how the knowledge fits together, what matters most, and how others can understand it. section 17.1.3
A web-development expert
For an article about new web-development trends, expertise might come from several years as a web developer, contributions to a popular framework, a series of relevant posts, a podcast, or conference talks. The authority comes from demonstrated familiarity, not celebrity status. section 12.0
Writing exposes both known gaps and unknown unknowns. Sustained study, structured explanation, technical editing, peer review, and reader scrutiny can deepen expertise while making it useful to others. section 17.1.3 section 17.1.2



