For fifteen years the advice was "start a blog." Publish regularly, target keywords, earn links. It still works, up to a point. But the way people get answers has shifted under it, and the content that answer engines prefer looks less like a blog post and more like a reference book.
This year I built a 235-term glossary for a tax practice. It is now the largest in its category, and it changed how I think about content for any expertise-driven business.
What answer engines actually cite
Look at what Google's AI Overviews, ChatGPT and Perplexity pull from when someone asks "what is a wash sale" or "how is a 1099-DA different from a 1099-B." They do not quote a 2,000-word opinion piece. They quote a clear definition, ideally from a page whose structure says "this is a definition," written by someone whose page says who they are.
That is three things: a direct answer, structured data that labels it, and visible expertise. A glossary delivers all three on every page, by design. A blog delivers them occasionally, by accident.
Why the glossary beats the blog for professional services
Expertise businesses, law, tax, finance, healthcare, are built on vocabulary. Clients arrive confused by terms, and the firm that explains the term is the firm that gets the call. A glossary meets people at the exact moment of confusion, which is earlier in the journey than any service page and more specific than any blog post.
It also compounds in a way a blog does not. Every term links to related terms and to the service page that solves the problem. Two hundred interlinked pages form a topical map that tells both crawlers and answer engines that this site covers the subject completely. A blog is a timeline; a glossary is a territory.
How to build one that gets cited
A few rules from doing it at scale:
- One term per page, with the term in the URL and the title. No "ten tax terms you should know" roundups; those are not citable.
- Answer in the first two sentences. The definition, plain, before any nuance.
- Mark it up. DefinedTerm schema for the term, FAQPage for the follow-up questions people actually ask.
- Put a real person on it. Author name, credentials, a bio page the author would stand behind.
- Cover what competitors skip. We mapped the category and found nobody covered small-business, expat or state-specific terms. Those gaps became the most valuable pages.
- Give each term a short video. One presenter, one term, under two minutes, embedded on the page with VideoObject schema. Now the term exists in search, in AI answers and on YouTube.
What about the blog?
Keep it, but change its job. The glossary owns the definitions. The blog owns the point of view: what changed this month, what the firm thinks about it, what a client should do now. Each blog post links to the glossary terms it uses. The two feed each other, and the glossary does the heavy lifting on visibility while the blog does the heavy lifting on trust.
The size question
Do you need 235 terms? No. You need more than the next-best resource in your category, and you need to cover the terms your competitors left out. For most businesses that is somewhere between sixty and a hundred and fifty pages. Build the first forty well, ship them, and add ten a month. The compounding starts sooner than you expect.
Own the definitions in your category. Each term is a page, each page has schema, and each page answers the question in the first two sentences.
