Topical authority in SEO: how to become visible in Google and AI

What is topical authority and how does it affect your SEO?

Topical authority is the level of expertise and trust a website builds around a specific topic. Search engines like Google use it, among other things, to determine which sites rank for certain searches, and AI systems like ChatGPT or Google's AI Overviews also use it to choose which sources to cite.

Topical authority affects SEO in two ways:

1. A website with high authority is rated better by Google as a whole. That means that not only do individual pages rank better, but you also rank higher for keywords you may not have created a separate page for.
   

2. AI search engines answer based on sources they trust. The stronger your topical authority on a topic, the greater that trust and the more likely your content will be used as a source.

So you could say that SEO is no longer just about keywords and rankings, it's about whether your website is seen as expert.

Topical vs. domain authority

Topical authority and domain authority are not the same thing. Topical authority is about how deeply and completely your website covers one specific topic or theme. Domain authority is about the overall strength of your domain through the number and quality of your backlinks.

In short, topical authority is about expert knowledge and domain authority is about name recognition. You still need backlinks for SEO, but topical authority has more impact on search results these days.

Especially since AI tools ChatGPT, Perplexity and Gemini prefer to use relevant, in-depth content. Regardless of domain authority.

How does topical authority in SEO and AI Search work?

With topical authority, Google and AI systems look not just at individual pages, but at the semantic coherence of an entire website. They look at whether your content covers topics completely, whether your pages are well connected internally and whether you write consistently on one topic.

Here's how it works: Google's algorithm and LLMs (the models behind AI tools) translate content into mathematical numbers (embeddings) and use them to calculate how well your content matches what someone is looking for. The deeper and more connected that content is, the stronger that number and the more likely AI is to quote or use your content.

In this way, website with 100+ short articles on many different topics (low consistency) therefore often scores worse than a site with 10 or 20 pages of in-depth content on a single topic (high consistency).

Therefore, less is more. Especially if less means your content is better then.

How do Google and AI tools measure topical authority?

To determine whether a Web site is an authority in an area, Google and AI tools look at a number of signals or ranking factors:

• How completely is a topic covered?

• How well are pages linked internally?

• How consistently do you write on one topic?

• And how well does your content align with the concepts and links they already know?

In addition, these factors also play a role:

• Timeliness and updates (how old is your content?).

• User signals (time on page, bounce rate, etc.)

• Expertise and reliability of the author (E-E-A-T).

• Consistency with other trusted sources (extra important for AI systems!).

What does it get you?

Strong topical authority leads to better results in AI Search, better rankings in Google and higher CTRs.

Here's how:

AI systems use Retrieval Augmented Generation (RAG) to generate answers based on trusted sources. The stronger the topical authority, the more likely your content will be included as a source.

Your content then becomes visible in AI answers from ChatGPT, Perplexity or Claude and you appear more often in AI Overviews at the top of search results.

ALs bonus, this increases recognition and trust. Users (and thus potential visitors and customers!) are more likely to click on a resource that is consistently visible: a higher click-through rate.

How to build topical authority in SEO

You build topical authority with topic clusters, semantic SEO techniques and strong E-E-A-T signals:

1. Create topic clusters

One of the most effective ways to build topical authority in SEO is through topic clusters. This involves focusing on one main topic and writing in-depth articles around it to demonstrate to search engines and AI systems that you have full command of a topic.

Instead of individual blogs, you thus build a cohesive network of different pages that all reinforce each other. Such a topic cluster usually consists of pillar pages, cluster content and internal links:

Pillar page

The pillar page is the central page where you explain a topic or theme as fully as possible. The idea here is that you cover all the important subtopics briefly and always link to a relevant article with more depth: the cluster content.

Cluster content

Cluster content consists of the supporting articles that each cover a specific part (subtopic) of your topic. With cluster content, you go deeper into sub-questions, long-tail keywords and practical applications.

Internal links

Internal links are crucial for building topical authority with a topic cluster. This is because they help search engines and AI tools better understand the interrelationship between pages and see your content as one cohesive whole.

From the pillar page you link to all relevant cluster content and from all cluster content you also link back to the pillar page. Optionally, you can also link cluster content between them (only if relevant).

2. Use semantic SEO techniques

Semantic SEO is optimizing content based on meaning, context and cohesion rather than single keywords. This is important for your topical authority because focusing on related terms, entities and subtopics shows that your content fully covers the topic.

These semantic SEO techniques help you build topical authority:

• Incorporate terms, concepts, tools and people consistently in your content to build a strong semantic network around your topic or theme
  

• make sure your content connects to multiple intentions (e.g., orientation, comparison, depth and application) to show that you are approaching the topic from multiple angles
  

• Use a hierarchical structure and build your content with logical h1-h2-h3 headings and short paragraphs to make it clear how everything is connected

3. Strengthen your E-E-A-T

E-E-A-T stands for Experience, Expertise, Authoritativeness and Trustworthiness and is used by Google and others to assess how reliable, expert and credible your content and website are.

Important for SEO, because E-E-A-T and topical authority reinforce each other. In fact, instead of just showing how well you cover a topic in terms of content, a strong E-E-A-T proves why your content can be trusted.

Or in other words, you can write a lot about a topic, but without demonstrable experience or expertise, your content is less trustworthy and you are not necessarily seen as an authority.

This is how you strengthen E-E-A-T:

• Use your own practical examples, cases, results and insights to show that you have experience with the subject.
  

• Make the authors of your blog visible through an author profile with relevant knowledge, experience and background to show your expertise
  

• Substantiate key claims with external sources or data to make your content more credible (tip: concrete numbers do well in AI Search!)
  

• Update your content regularly and keep it up to date
  

• Be transparent about your organization with a comprehensive "about us" and a contact page with clear contact information and company details

Which technical SEO implementations strengthen topical authority the most?

Topical authority is largely determined by your content, but also by how well your website is technically set up to make that content understandable and coherent.

These are the key technical SEO implementations that have the most impact:

1. Crawlability and indexing

Make sure all your pillar pages are easily accessible and that your cluster content is indexable. cluster content is easily reachable and indexable.

Because, of course, you can only build topical authority if search engines and AI tools can fully crawl and understand your topic clusters.

2. Site architecture

Organize your website around themes rather than individual pages. Work with logical URL structures to group related content within the same silo or category.

URLs like domain.com/seo/topical-authority/, domain.com/seo/linkbuilding/ and domain.com/seo/keyword-research/ help search engines understand that topical authority, link building and keyword research fall within the topic of SEO.

3. Schema markup (structured data)

Schema markup (also called structured data) is extra code on your Web site that helps search engines and AI tools better understand content on a page.

Extra code? No worries. Visitors don't see any of it and you can easily add it yourself with most SEO plugins.

Use schema like BreadcrumbList, FAQ and Organization to give extra context to your content and show how it fits within a bigger picture.

Roadmap for content marketers & small websites

This is how you consistently build authority as a content marketer or company:

1. Choose one main topic (the more specific, the faster you build authority)

2. Determine subtopics and map all relevant questions, subtopics and angles

3. First, create your pillar page by writing a complete article that outlines the entire topic

4. Step by step, work out all subtopics in separate articles (cluster content) and connect them to the pillar page via internal links.

5. Keep improving, supplementing and expanding your content regularly with new insights and subtopics

Consistency and focus are key. Rather work one topic really well than ten topics halfway. That way you can compete with the big players even on a limited budget.

Need help boosting your topical authority?

Need help with a good content strategy? Don't have time to create that content or want to have your content optimized by a specialist? We'd be happy to help.

Feel free to get in touch.