Topic Clusters and Pillar Pages: Planning Content for Topical Authority
- Filed November 10, 2026
- Content strategy, guide 12 of 13
A topic cluster is a way of organizing content: one hub page (called a pillar in some SEO writing) gives an overview of a broad topic, and a set of supporting pages each covers one specific subtopic in depth, with links connecting them. It is an information architecture decision that helps readers navigate a subject and helps search engines understand how pages relate. It is not a ranking formula. “Topical authority” is used in SEO as shorthand for a site being recognized for depth in a subject; Google has not published a general topical authority score. The closest Google term is a news-specific system: in May 2023 Google described “topic authority” as a system that helps determine which expert sources are helpful for newsy queries “in certain specialized topic areas, such as health, politics, or finance” (Google on news topic authority). Outside that context, a cluster’s value is the quality and organization of the content in it.
Why clusters help
- Readers can start broad and go deep, or land on a specific page and find the context around it.
- Search engines discover related pages through links and see which page covers the overview and which pages cover details. Google’s link guidance says it uses links to determine the relevancy of pages and to find new pages (Google’s link best practices).
- Teams can see coverage gaps and avoid writing two pages for the same intent.
Anatomy of a cluster
| Part | Role | Content |
|---|---|---|
| Hub (pillar) | Owns the broad intent | Overview of the topic, short sections summarizing each subtopic, links to every supporting page |
| Supporting pages | Each owns one narrow intent | Full depth on its subtopic, link back to the hub, links to closely related siblings |
| Navigation | Makes the cluster findable | Hub reachable from main navigation or a section index |
The hub summarizes; it does not reproduce each supporting page in full. A hub that tries to answer every subtopic completely competes with its own supporting pages.
Planning a cluster
- Choose the topic by audience need and business relevance, not only by search volume.
- Map subtopics: the questions, tasks and decisions people have within the topic. Sources include search data, customer questions, support tickets and the results pages for the topic.
- Assign one primary intent per page. Each subtopic gets one page. Check the existing content inventory: if a page already owns an intent, it joins the cluster instead of a new page being written.
- Write exclusions. For each page, note what it does not cover because another page in the cluster does.
- Plan links: hub to every child; every child to the hub; children to siblings only where the reader benefits.
- Sequence production: publish the hub with the most important supporting pages; add the rest over time, updating the hub as each page appears.
An example hub and cluster architecture
As an illustration, take a personal finance site planning a cluster on “emergency funds”.
Hub: “Emergency Funds: How Much to Save, Where to Keep It, and When to Use It”
- overview of what an emergency fund is for;
- short sections summarizing each subtopic below, each linking to its page.
Supporting pages:
| Page | Primary intent | Excludes (owned elsewhere) |
|---|---|---|
| How much should be in an emergency fund | Sizing the fund for different situations | Account types |
| Where to keep an emergency fund | Comparing account types for access and safety | Sizing |
| Building an emergency fund on a low income | Step-by-step saving plan | Investment options |
| When to use your emergency fund | Decision guide for qualifying expenses | Debt payoff strategy |
| Emergency fund vs paying off debt | Decision between two goals | Detailed debt payoff methods |
Each supporting page then gets its own content brief, carrying the intent and the exclusions from this table so writers do not drift into a neighbor’s topic.
Because personal finance affects readers’ financial stability, each page needs accurate, sourced information and clear statements of where individual circumstances change the answer.
Measuring a cluster
- Search Console impressions and clicks for the hub and supporting pages, grouped as a set.
- Coverage: subtopics in the map that have a page, and pages that earn impressions.
- Internal navigation: whether readers move from the hub to supporting pages (analytics paths or link click events).
- Overlap: whether two pages in the cluster receive impressions for the same queries and alternate, which can indicate the intents were not separated well (keyword cannibalization).
Mistakes to avoid
- Treating the cluster as a link pattern instead of a content plan.
- Writing many thin supporting pages for minor keyword variations.
- Hubs that duplicate the supporting pages.
- Linking every page to every other page.
- Expecting a cluster to rank because of its structure rather than its content.
A cluster organizes good content so that it is easier to find and understand. The organization helps; the content does the work.