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What Are Topic Clusters and Content Hubs?

Learn what Topic Clusters and Content Hubs are, how they differ from traditional SEO silos and why they remain important for building topical authority and improving SEO performance in 2026.

One of the concepts that frequently appears in modern SEO discussions is the idea of Topic Clusters and Content Hubs. These terms have largely replaced the older SEO concept of "silos" and reflect how search engines have become better at understanding relationships between pages and topics.

If you are responsible for a business website, understanding topic clusters can help improve your site's organisation, user experience and search engine visibility.

What Is a Content Hub?

A Content Hub is a central page that covers a broad subject and links to a collection of related articles.

Think of it as a table of contents for a particular topic.

For example, an SEO training provider might create a hub page called:

SEO Training and Resources

That page could then link to supporting articles covering:

  • Keyword Research
  • Technical SEO
  • Core Web Vitals
  • E-E-A-T
  • Internal Linking
  • Google Search Console
  • AI Overviews
  • Structured Data

The hub page provides an overview of the subject, while the supporting articles explore individual topics in greater depth.

What Is a Topic Cluster?

A Topic Cluster is the collection of related pages that support a central topic.

Using the previous example:

Content Hub

SEO Training and Resources

Supporting Topic Cluster Pages

  • What Is Technical SEO?
  • Understanding Core Web Vitals
  • What Is E-E-A-T?
  • How Does Google Index Websites?
  • Internal Linking Best Practices
  • Understanding Structured Data
  • How AI Overviews Are Changing SEO

Together, these pages create a cluster of content around the broader subject of SEO.

Why Are Topic Clusters Important?

Search engines no longer evaluate pages in complete isolation.

Google attempts to understand:

  • The overall purpose of a website
  • Relationships between pages
  • Subject expertise
  • Content depth
  • User intent

A website that contains dozens of well-organised articles about a subject is often viewed as a stronger authority than a website with a handful of disconnected pages.

Topic clusters help demonstrate:

  • Experience
  • Expertise
  • Authority
  • Trustworthiness

These principles align closely with Google's E-E-A-T guidelines.

An Example

Imagine two websites.

Website A

Contains:

  • SEO Services
  • Contact Us
  • About Us

Website B

Contains:

  • SEO Services
  • Keyword Research Guide
  • Technical SEO Guide
  • Core Web Vitals Guide
  • E-E-A-T Guide
  • Internal Linking Guide
  • Google Search Console Guide
  • AI Overview Guide

Website B provides significantly more information about SEO and is therefore better positioned to demonstrate expertise.

Internal Linking Matters

One of the key features of a topic cluster is sensible internal linking.

For example:

The page about Core Web Vitals may link to:

  • Technical SEO
  • Website Speed Optimisation
  • Mobile SEO

Similarly, a page about E-E-A-T may link to:

  • Author Profiles
  • Trust Signals
  • Content Quality

These links help users discover related information while also helping search engines understand the structure of the site.

The goal is not to force links into content but to create logical pathways between related subjects.

Topic Clusters vs SEO Silos

Many older SEO courses taught a concept known as siloing.

A silo structure often looked like this:

SEO
├── Technical SEO
├── Link Building
├── Keyword Research
└── Content Marketing

Pages were often prevented from linking outside their own silo.

Modern SEO is generally more flexible.

Google is now extremely good at understanding relationships between topics and pages. While a clear structure is still valuable, most SEO professionals now favour topic clusters and content hubs rather than rigid silo structures.

The focus has shifted from creating isolated categories to building interconnected collections of useful content.

How AI Is Reinforcing Topic-Based SEO

The rise of AI-powered search experiences, including AI Overviews, has made topical authority even more important.

When Google's systems evaluate content for AI-generated answers, they increasingly look for:

  • High-quality information
  • Demonstrated expertise
  • Supporting content on related subjects
  • Strong trust signals

A well-developed content hub can help establish the credibility required to compete in these newer search environments.

Building a Content Hub

A simple process might look like this:

Step Action
1 Identify a core topic
2 Create a comprehensive hub page
3 Publish supporting articles
4 Link related pages together
5 Regularly update and expand content
6 Monitor performance in Google Search Console

Over time, the hub grows into a valuable resource for both users and search engines.

Conclusion

Topic Clusters and Content Hubs are modern approaches to organising website content around key subjects.

Rather than publishing isolated articles, businesses can create collections of related content that demonstrate expertise and help visitors find the information they need.

For many websites, developing strong content hubs around important business topics can improve user experience, strengthen topical authority and support long-term SEO performance.

In 2026, successful SEO is increasingly about demonstrating expertise across an entire subject area, and content hubs provide an effective framework for achieving that goal.

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