Aleisha White

Topic clusters are a collection of blogs that explore different angles or perspectives on the same primary topic. Organizing topic clusters around a few central pillar pages related to your core offerings makes it easy for search engine bots to crawl your website and cite your brand.

Imagine your website is a supermarket, and traditional and AI crawlers are supermarket critics buying their groceries. In this scenario, it’s in your best interest that they can find everything they need — and easily. If they can, they’ll recommend your brand. If your supermarket is in disarray, they’ll walk out and find a more organized one to promote.

This is increasingly the reality of digital search. Crawlers need depth, breadth and organization of your content topics before they lift your brand into AI citations or page one of the SERPs. Content clusters are the best way to get there. 

Here’s everything you need to know about using AI to build topic clusters that increase your chances at search visibility.

What Are Topic Clusters

A topic cluster is a group of interlinked content pages created around one main subject. The pillar page addresses the broader topic, while supporting cluster pages explore related subtopics in greater depth. Your pillar page links back to each of your cluster pages, and vice versa. Cluster pages should also link to one another, where relevant.

This structure gives search engines the organization they need to validate the depth and breadth of your brand’s expertise and lift your content in generated responses.

Pillar Pages

Content pillar pages are broad, comprehensive guides to a topic. They target a high-level and competitive keyword, such as “lizard care,” that covers broad intent and captures high search volume. Of course, there’s no way to cover the entire topic in a single sitting. These pages serve as your go-to guides, and your internally linked cluster pages break the topic down in more detail.

Cluster Pages

Cluster pages cover one subtopic or question that stems from your pillar page and addresses — importantly — related questions or topics your audience searches for. They target specific, long-tail keywords, like “what foods do lizards eat” and “how much sunlight do lizards need.”

Between five and twelve is a good number of cluster pages per topic, all of which link back to your pillar topic, clearly demonstrating to search crawlers:

  1. Your depth of expertise on the subject.
  2. Your ability to comprehensively satisfy search intent.

The role of your internal linking structure is to connect topics within a cluster, creating a network of intertwined pages.

Why Topic Clusters Matter

Topic clusters provide an organized way to prove your industry expertise to crawlers and facilitate information retrieval for your audience. The benefits include increased authority in your niche, improved search visibility and a better user experience (which can lead to more time on page). Each of these is fuel to the fire of your content marketing strategy.

Here’s what effective clusters can achieve for your brand:

  • Topical authority: In-depth topical coverage signals expertise to search engines, so each supporting page strengthens the others.
  • Search rankings: Pillar pages compete for broader terms, while cluster pages compete for long-tail KWs and FAQs, so your content covers the spectrum of searches.
  • User experience: Readers can easily access related information to learn more about a subtopic.
  • AI search visibility: Organized, in-depth coverage can make your expertise more evident to AI and traditional search engines, helping them understand and cite your content.

How To Build Topic Clusters With AI

In the past, a simplified process for building topic clusters was top-down: decide on your core topics, generate a few ideas around them and write the pages.

Now, we strategically reverse-engineer this process: start by exploring the intent and topical depth of relevant, strategically viable keywords, group them into intent-based subtopics, identify your existing content gaps and build pillar and cluster pages as required.

This process is a more structured way to scale your content while increasing search visibility, and AI can give you razor-sharp targets.

1. Choose Your Core Topics

The number of pillar pages you create depends on the extent of your services. For a small business, it might be three to five; for an enterprise, you might have three to five for each core offering.

Prompt AI with one main topic and audience at a time to find related subtopic ideas, including long-tail keywords, related searches and questions. Once you have a shortlist, check search demand in keyword research tools like Semrush or Ahrefs. Save the subtopics, long-tail keywords and search queries AI surfaces to form the basis of your ideation. These will seed the keyword list you build out later on.

Most AI tools can help you start this process, but proceed cautiously: Generic tools will point you in generic directions. A dedicated content marketing tool (ahem, like contentmarketing.ai) starts the process from a marketer’s perspective, considering AI visibility, your domain’s topic authority, and other important factors.

2. Research Search Intent

Having your topic ideas is half the equation; knowing what to do with them is the other. For both SEO and GEO optimization, it’s critical to address search intent in your pillar and cluster pages. Search intent could be informational, commercial, transactional or navigational.

Give AI your keywords and ask it to note the search intent for what’s currently ranking. If needed, validate this manually by typing the keyword into search engines and checking what surfaces in the top results. 

Next, plug each potential keyword into an AI chatbot and ask it to summarise what the top results have in common, including format, angle and depth. Record user intent and topical depth for each and run a quick manual pass to check everything makes sense.

This is another step where dedicated content marketing tools can help keep your efforts keyed into your goals. While ChatGPT might recommend you begin with the most popular topics, contentmarketing.ai will give you suggestions that take popularity into account alongside your brand’s expertise, the topic’s competitiveness and more.

3. Group Related Keywords

Now that you have a list of keyword ideas and a better understanding of their search intent and topical depth, organize them into content groups. If you’re doing your keyword research separate from your AI platform, upload your keyword export and ask your chatbot to group searches based on the problem they solve, rather than phrasing similarity.

You should end up with a list of distinct subtopics, each with one primary keyword and a group of closely related secondary keywords. Each group should represent a topic that you can address comprehensively on a single page.

If two keywords have different wording but the same intent, for instance, “lawn mowing frequency” and “how often to cut grass”, they belong together. If they require different answers, for example, “lawn mowing frequency” and “lawn aeration”, they’ll need separate pages.

If you’re doing this process with contentmarketing.ai, the platform will do this step for you.

4. Identify Content Gaps

Compare your keyword groups against your existing long-form content to identify gaps and opportunities. Give AI your organized keyword list and a sitemap or export of your existing URLs. Ask it to match each group to relevant pages and flag any gaps, as well as thin coverage or overlapping content.

A gap is a subtopic your website doesn’t cover sufficiently to address search intent. Not every gap needs a fresh article — you might find an existing page needs expanding or updating rather than replacing. Prioritize the opportunities that align with your core offerings, audience needs and search demand.

This is another step that’s only really required if you’re carrying this process out with generic AI tools. Identifying content gaps is something dedicated content marketing tools are usually designed to do from the start.

5. Plan Your Pillar Content

With your content groups established, you can start planning the structure of your clusters. Ask AI to outline a pillar page for each topic cluster, using the keyword groups to build out the main sections and supporting cluster pages.

Your pillar page introduces the broader subject. It sweeps across the key areas and directs readers to more detailed cluster pages as relevant. Think of it as the ultimate guide that brings your keyword clustering together, not a page that tries to answer every question in depth at the outset.

Review the outline to make sure it reflects your audience’s needs and your business expertise. AI will help you organize the information, but you decide what ends up on your website.

6. Create Cluster Pages

Once your pillar structure is in place, build out supporting pages. Use your keyword groups and search intent data to brief AI on each cluster page. Include its primary keyword, audience, purpose and which questions the page needs to answer.

Every page should provide a complete answer to its specific topic without repeating large sections of your pillar or other cluster pages. Make sure writers review AI-generated drafts for data accuracy, originality, brand alignment and useful insights. Also, try to place answers as early as possible beneath the headings.

7. Structure Internal Links

Your pillar and cluster pages are now in place, and they need to work together. Internal links connect related pages, so readers can find more information and search engines have context about how your content works as a system.

Ask AI to check your URLs and suggest relevant links between your pillar and cluster pages, including descriptive anchor text. All of your cluster pages should link back to their pillar, while the pillar should link out to its supporting pages. You can also link between cluster pages when the connection adds value and context.

Review the suggestions manually. Only add links where they make sense. (Based on your research, all of your pillar-to-cluster page links should be perfectly logical). The goal is to create a clear, meaningful path through your content.

Best Practices for Building Topic Clusters

There’s a fine line between adding new topics to your content library and implementing strategic topical authority. Here are a few best practices to keep in mind as you get started:

  • Prioritize topical depth: Don’t publish five thin articles just to fill out a cluster. Each page should offer useful information that addresses its own search intent.
  • Avoid content overlap: If two pages answer essentially the same question, combine them rather than creating duplicate content.
  • Use descriptive anchor text: Internal links should tell readers and search crawlers what they’ll find on the linked page. Integrate them naturally into your body copy and avoid anchors like “click here.”
  • Update existing content: You don’t need to start everything from scratch. Review what you’ve already published and see where you can expand, refresh or connect existing pages.
  • Review your clusters regularly: Search behavior, audience questions and your offerings will change over time. Revisit your keyword groups and content to make sure they’re still accurate and up-to-date.

Organize Your Content for the Current Search Landscape

Traditional and AI search visibility depends on how you organize your content. Topic clusters turn loose or scattered content into a clear system that crawlers (and people) can easily find, read and boost.

Start with your big ideas, shape them through research and use AI to formulate them into clear, structured pages that expand your topical authority.