Short answer: Authority topics are the general themes an AI model surfaces in its answers and treats as central to a subject or sector — the dimensions it considers authoritative — without tying them to any single brand. They're the AI's "agenda" for a category: the topics it thinks matter when discussing the space. Topic authority, then, is about understanding that shared topical landscape and making sure your brand appears within the themes the model already considers important. That's how you improve your visibility in ChatGPT and Gemini.
Most people confuse this with "being the authority on a topic." In the context of AI answers it's subtly different — and more useful. Here's what it really means.
What are authority topics?
Authority topics are the recurring, general themes that AI models raise when answering questions about a subject or industry. They appear across the responses as the framework the model uses to think about the space — for example, in hosting: uptime, security, scalability, support, pricing.
The defining trait: authority topics are not assigned to a specific brand. They belong to the category. They represent what the AI treats as the authoritative dimensions of the subject, independent of who provides it. Any brand may or may not appear within a given authority topic, but the topic itself is general.
That's what makes them valuable: they reveal the agenda the model evaluates your entire market against.
Authority topics ≠ brand topics
These two are easy to mix up, but they sit at different levels:
- Brand topics are assigned to a specific brand: "What themes does the AI associate with this brand?" (e.g. "Brand X → price, support").
- Authority topics are general: "Which themes does the AI treat as central and authoritative for this subject — regardless of brand?"
Brand topics are brand-specific. Authority topics are the category-level framework. You want both: strong, positive brand topics and presence inside the authority topics that define your sector. Read the companion piece on brand topics.
How AI forms authority topics
Authority topics emerge from the patterns across everything a model has learned and retrieves about a subject:
- Recurrence across answers. Themes that show up again and again when the subject is discussed become the model's default dimensions for it.
- Cross-source consensus. When many credible sources frame a subject around the same themes, the model treats those themes as authoritative.
- Independence from any one brand. Because they come from the whole conversation about a category, they aren't anchored to a single provider — they're the shared vocabulary of the space.
This is why they're stable and meaningful: they reflect how the model understands the subject, not how it feels about one company.
Why authority topics matter for your visibility
Authority topics are the conversation your customers' questions live inside. If your brand isn't present within them, you're missing from the part of the answer that actually drives decisions.
- They show what to cover. The authority topics of your sector are the themes you must address to be considered relevant by the model.
- They expose gaps. An authority topic where your brand never appears is a visibility hole — the AI discusses that dimension of the category without you.
- They reveal whitespace. An authority topic that no brand clearly owns is an opportunity to become the answer for it.
- They keep you on-agenda. Aligning your content and presence with the authority topics keeps you inside the framework the model uses to evaluate the whole market.
In short: brand topics tell you how you're described; authority topics tell you where the conversation is happening — and whether you're in it.
How to use authority topics
- Identify the authority topics in your sector. Map the general themes ChatGPT and Gemini consistently raise when discussing your category.
- Check your presence in each. For every authority topic, see whether your brand appears at all within the model's answers on that theme.
- Find your gaps. Flag the authority topics where you're absent — these are your priority targets.
- Spot the whitespace. Identify authority topics no brand clearly owns, where you can move first.
- Align your content and sources. Build presence on the themes the model already treats as central, on the sources it draws from.
For the tools that support this work, see tools for optimizing content visibility on ChatGPT and Gemini.
How to see your sector's authority topics
You can sketch them manually by asking ChatGPT and Gemini broad category questions and noting the themes that keep recurring across answers. To do it systematically — and to see which brands appear within each theme — you need a tool.
LLM Visibility includes a Topic Authority view that surfaces the general, authoritative topics the AI raises across responses in your sector — the themes that aren't tied to a single brand — so you can see which dimensions the model treats as central, where your brand is present or absent, and where the gaps are. Combined with Entity association analysis, Share of Voice and the LLM Training Signal (whether your content sits on the sources models cite), it turns the category's topical agenda into a concrete action list. For the tracking foundation, see best ChatGPT SEO tracking software.
FAQ
What are authority topics in AI? They're the general themes an AI model treats as central and authoritative when discussing a subject or sector — not assigned to any single brand, but representing the dimensions the model considers important for the whole category.
How is topic authority different from brand topics? Brand topics are tied to a specific brand ("what is brand X known for?"). Authority topics are general and category-level ("which themes does the AI treat as authoritative for this subject, regardless of brand?").
Why do authority topics matter for visibility? They're the framework the model uses to discuss your market. If your brand doesn't appear within the authority topics of your sector, you're absent from the conversation that drives decisions.
How do I find my sector's authority topics? Ask ChatGPT and Gemini broad category questions and note the themes that recur, or use a GEO tool that surfaces them automatically across many responses.
Can I see which brands appear in each authority topic? Yes — while the topic itself is general, a tool like LLM Visibility lets you see where your brand (and competitors) appear within each authority topic, exposing your gaps and opportunities.
See the authority topics shaping your sector in ChatGPT and Gemini — and where you're missing. (https://llmvisibility.tech).