When you build a website, you already know what your business offers and who your content is for. Search engines don’t have that human context. Instead, they use signals like page content and links to discover your pages and understand what your site is about.
Organizing your site around topic clusters gives search engines more of that context. By building a central hub page for a broad topic and connecting it to focused, supporting content, you create a clear structural hierarchy. This signals expertise and authority to search engines while giving human visitors an intuitive pathway to explore your site.
Here’s how to create this structure with tools you likely already use.
What are topic clusters?
A topic cluster is a group of connected pages or posts on a website organized around the same theme.
The goal of a topic cluster is to build topical authority for this theme and improve search rankings for related keywords. By publishing several distinct pieces of content about the same subject across your website, you can consistently demonstrate your expertise to readers and search engines alike.
How topic clusters work on your website
Topic cluster is a technical SEO term, but it describes a straightforward framework for grouping related content.
At its core, a topic cluster consists of three elements:
- A hub or pillar page covering an overarching subject
A hub or pillar page covering an overarching subject
- Individual cluster pages that explore specific subtopics in detail
Individual cluster pages that explore specific subtopics in detail
- Internal links between related articles in the same cluster
Internal links between related articles in the same cluster
For example, if you run a wellness business, you could publish one main guide to self-care instead of isolated posts on separate wellness subjects. That main self-care guide serves as the structural hub. Individual posts, like guides on the mental health benefits of yoga or articles on stress management through breathwork, serve as the cluster pages.
The structure of that self-care cluster would look like this:
- Hub page: The Ultimate Guide to Daily Self-Care
Hub page: The Ultimate Guide to Daily Self-Care
- Cluster page: The Mental Health Benefits of Morning Yoga
Cluster page: The Mental Health Benefits of Morning Yoga
- Cluster page: Stress Management Through Breathwork
Cluster page: Stress Management Through Breathwork
- Cluster page: Nutrition Habits to Fuel Your Self-Care Regimen
Cluster page: Nutrition Habits to Fuel Your Self-Care Regimen
- Cluster page: A Nightly Wind-Down Routine for Better Sleep
Cluster page: A Nightly Wind-Down Routine for Better Sleep
Each cluster post links back to the primary hub, and related cluster posts link to one another where contextually appropriate. This internal linking structure makes it easier to navigate your site and find related content. A reader on your self-care guide can click through to a specific practice, then easily get back to the main guide.
Why topic clusters help search engines and visitors
Search engines use links and page content to evaluate how pages relate to one another. When you link a group of related articles to a core hub page, you establish a clear relationship between those pages.
This structure also helps visitors find related information, which can support search visibility and answer engine optimization (AEO), the practice of making your content easier for AI tools to find and cite. A visitor landing on an article about yoga techniques may also want to explore nutrition or meditation. Contextual internal links point them to the next relevant topic.
This can have the added benefit of making your content more likely to be cited in AI-generated answers, such as Google AI Overviews or ChatGPT responses. Google's documentation notes that AI Overviews and AI Mode may use a query fan-out technique. This process splits a single user prompt into multiple related queries and consolidates the information into one response. That makes comprehensive coverage of related questions useful, even if topic clusters don't guarantee AI citations.
Creating topic clusters on your website
Setting up a topic cluster framework doesn't require custom code or complex site architecture. Many content management systems and website builders, including Squarespace, build internal links into their core structure through collection pages and navigation menus.
Follow these steps to create a topic cluster for your business or personal website.
1. Choose a topic your audience cares about
Start with a broad topic that's closely connected to your business or project and gives you room to answer several related customer questions. Avoid building a content cluster around a subject that's not relevant to your brand, simply because it has search volume.
2. Use collection pages as your primary hubs
Collection pages—like Blog, Store, Events, or Courses pages—group related items and link visitors to individual pages. When you publish a new post or item, the parent collection page catalogs and links to that new item, establishing the baseline hub-and-spoke relationship. On Squarespace, these collection pages are built into the site structure by default. If you're starting from scratch, you can start a blog on Squarespace and use it as your first hub.
3. Add contextual internal links within body text
While collection pages provide the main directory, manually add contextual internal links within the body text of your cluster posts. When drafting a post about yoga's mental health benefits, for instance, you can highlightdescriptive anchor text to link directly to your related post on breathwork.
4. Categorize and tag for deeper organization
To refine your cluster structure further, use categories and tags within your collection settings. Grouping posts under specific categories creates clean, automated sub-filtering pages. Search engines crawl these category pages, giving them additional context on how your topics interconnect. Plus, they help visitors find content that interests them. You can read more about organizing collection items in Squarespace’s guide on categories and tags.
How to know if your topic clusters are working
To measure the impact of your topic clusters, monitor your organic search traffic, keyword rankings, and AI visibility metrics.
In your Squarespace Analytics panel, check your pageviews and bounce rates for both the hub page and its cluster pages. Look for signs that visitors are discovering related content, alongside changes in organic traffic to the hub and cluster pages.
To monitor AI visibility, use Squarespace's AI Visibility tool, which runs relevant prompts through ChatGPT and Gemini to check how often your site is mentioned in responses. This gives you a more complete picture of your search performance.
Building long-term search authority
Structuring your site into clear topic clusters helps search engines understand how your pages connect and provides visitors with a clear way to find the information they need. By organizing content around central hub pages and connecting subtopics with contextual internal links, you establish an intuitive architecture that supports both human navigation and search discoverability.
To explore further strategies on keyword analysis, metadata setup, and writing alt text, watch the full SEO with Your Squarespace Site webinar.
Frequently asked questions
What is a topic cluster?
A topic cluster is a group of related pages built around one theme. A central pillar page covers the broad topic, and supporting cluster pages cover specific subtopics in depth. Internal links connect the pages, which helps search engines and visitors understand how your content fits together.
What is a pillar page?
A pillar page is the central page in a topic cluster. It gives a broad overview of one subject and links out to more detailed cluster pages. Some marketers call it a hub page. On a Squarespace site, a blog post, a collection page, or a standard page can all work as a pillar.
What's the difference between topic clusters and content clusters?
The terms are usually used interchangeably. Both describe a group of related pages connected by internal links. Some marketers use "content cluster" more loosely for any group of related content, while "topic cluster" refers to the pillar-and-subtopic structure built to show depth on one subject.
How many pages should a topic cluster have?
A good starting point is one pillar page and three to five cluster pages. That gives you enough coverage to show depth on a topic without stretching your time too thin. You can add cluster pages as you learn which questions your customers ask most often.
How does internal linking help SEO?
Internal links help search engines find your pages and understand how they relate to each other. Google recommends descriptive anchor text, so a link reading "breathwork for stress relief" tells readers and search engines more than a link reading "click here."
