Topic Cluster Example: Mapping Keywords to Pages

You've read that topic clusters are how you build authority. You understand the concept — pillar page, supporting content, internal links. But when you sit down to actually build one, you realize you don't know what it looks like in practice. Which keywords go where? How many supporting pages? How do you decide what the pillar covers versus what gets its own page?

Here's a concrete example from start to finish.

The Core Idea Before the Example

A topic cluster is a group of pages on your site that cover a subject from multiple angles. One page (the pillar) covers the broad topic. Several supporting pages go deep on specific subtopics. Internal links connect them.

The reason this works is that Google doesn't just evaluate individual pages — it reads the relationship between pages. A site with fifteen pages on project management signals expertise on project management in a way a single page never can. Topical relevance comes from content volume, not from one perfectly optimized post.

A Real Topic Cluster Example: Project Management Software

Let's say you run a SaaS product for small business project management. Here's how you'd build the cluster.

The Pillar Page

Target keyword: project management software for small business
Search intent: someone comparing options, early in their decision
Page type: broad overview
What it covers: what to look for in PM software, categories of tools, common use cases, brief comparison of approaches

The pillar doesn't go deep on any one thing. It's wide. It links out to every supporting page. It's the hub.

Supporting Pages (Cluster Content)

Each supporting page targets a more specific keyword — a question the pillar can't fully answer without becoming unwieldy.

Each of these pages links back to the pillar. The pillar links to each of them. Some cluster pages also link to each other where it makes sense (Kanban vs Gantt might link to the timeline setup page, for example).

How Keywords Get Assigned to Pages

The most common mistake is treating every related keyword as a candidate for its own page. It isn't. Before you create a new page, ask:

Does this keyword have different intent than what the pillar covers?

If someone searching "project management software for small business" and someone searching "kanban vs gantt for small teams" would want the same content, you don't need two pages. If they'd want different content, you do.

A useful test: open the search results for both keywords. If the same URLs rank for both, Google already considers them the same topic — use one page and target both. If the SERPs look different, build separate pages.

Can the pillar answer this in 200 words, or does it need 800?

"What is a Gantt chart?" can live as a section in the pillar. "Kanban vs Gantt: a full comparison for small teams" needs its own page. When a subtopic needs depth, give it its own URL.

What the Internal Link Structure Actually Looks Like

Here's the link map for the example above:

Pillar: Project Management Software for Small Business
  ↔ Project Timeline Templates
  ↔ Kanban vs Gantt
  ↔ Task Assignment and Accountability
  ↔ Remote Team PM Software
  ↔ Free vs Paid PM Tools
  ↔ Migrating from Spreadsheets

Every arrow is bidirectional — pillar links to cluster, cluster links back to pillar. Cluster pages link to each other only when the link genuinely helps the reader (not as a mechanical rule).

The anchor text matters. Don't link back to the pillar with "click here." Use the keyword: "choosing the right project management software for small business" as the anchor.

How Many Cluster Pages Do You Need?

There's no magic number. Three supporting pages beat zero. Ten beat three. The honest answer is: as many as there are distinct, searchable subtopics in your niche that you can write well.

Building topical authority at scale is what separates sites that rank across dozens of keywords from sites that compete for one. The volume is part of the signal.

For a new cluster, a reasonable starting point is 5–8 supporting pages. Once those are indexed, look at what's ranking, what's not, and what keyword gaps remain. Then extend.

A Second Example: Personal Finance Blog

If you're a content site rather than a SaaS, the model is the same.

Pillar: budgeting for beginners
Cluster pages:

• How to make a monthly budget (step-by-step)
• Zero-based budgeting explained
• Envelope budgeting method
• How to budget when income is irregular
• Best budgeting apps
• How to stick to a budget when you keep overspending
• Budgeting for a couple with different spending habits

The pillar covers what budgeting is, why it matters, and the main approaches. Each cluster page takes one approach or problem and goes deep. A reader who lands on any page finds links to the others. Google, reading the full site, sees a domain that knows budgeting.

This is how you make your site topically relevant to Google — not through metadata and keyword density, but through the shape of your content.

Starting Your Own Cluster

The practical steps:

1. Pick your pillar topic — broad enough to have subtopics, specific enough to be winnable
2. List every question someone in that audience might search — use Google's autocomplete, People Also Ask, and competitor content
3. Group questions by intent — similar intent = same page, different intent = separate page
4. Assign a target keyword to each page — one primary keyword per page
5. Build the pillar first, then supporting pages, then link them
6. Check your work: does every cluster page link to the pillar? Does the pillar link to every cluster page?

If you're doing this across a large site with many potential clusters, the mapping phase gets labor-intensive. Tools like Ahrefs and Semrush can surface keyword data; Rankfill identifies which keyword clusters your competitors are already capturing that your site is missing, so you know where to prioritize.

For a deeper look at how to sequence and structure this work across a full site, content clusters at scale covers the planning layer in more detail.

FAQ

What's the difference between a pillar page and a cornerstone page?
Same concept, different vocabulary. HubSpot popularized "pillar page," WordPress uses "cornerstone content." Both mean a broad, authoritative page that anchors a topic and links to supporting content.

Can a cluster page rank for multiple keywords?
Yes. A page targeting "kanban vs gantt" might also rank for "kanban board for small teams" or "difference between kanban and gantt." You're optimizing for a primary keyword but capturing related ones naturally.

How long should a pillar page be?
Long enough to cover the topic without going so deep that it cannibalizes your cluster pages. In practice, 2,000–3,500 words is typical, but length should follow what the topic actually requires.

Do I need to build all the cluster pages before any of them rank?
No. Each page can rank independently. But the cluster effect — where your pillar and cluster pages reinforce each other — builds as you add more content. Publish what you have, then extend.

What if two cluster pages target similar keywords?
Consolidate them. Two thin pages targeting overlapping keywords compete with each other (keyword cannibalization) and dilute your authority. One thorough page almost always outperforms two weak ones.

How do I know if my clusters are working?
Track rankings for each page in the cluster, the pillar's organic traffic over time, and how many cluster pages are indexed and appearing in search. If the pillar rises as you add cluster pages, the strategy is working.