Pillar pages and topic clusters are a way of organizing content around one subject. The pillar page gives a broad overview of the subject and links out to every cluster page. Each cluster page answers one narrower question in depth and links back to the pillar. Built well, the pillar becomes the page for the broad keyword, the clusters own the specific ones, and the links make the relationship obvious to readers and to Google.
The definition is easy. The build is where people go wrong: pillars that try to answer everything, clusters that compete with their own pillar, and links that only run one way. This guide is the practical side, with tables you can copy and four real pillars from our own blog, dissected.
One boundary first. If you’re still deciding between this model and a strict silo, I compare the two in content silo vs topic cluster. Here I assume you’ve picked clusters.
Where Did the Pillar and Cluster Model Come From?
HubSpot made the model popular. Its own topic clusters article traces it to 2015 research called “Topics Over Keywords” by Anum Hussain and Cambria Davies, and HubSpot restructured its blog around the idea after that.
HubSpot’s definition is still the cleanest one I know. The pillar “covers a broad subject at a high level,” while cluster pages each address “a specific subtopic, long-tail question, or use case.” Its advice for the pillar is to “cover breadth, not depth.”
Google has never named this model in its documentation. What it does say lines up with it, though. Its link guidance asks you to link to related pages “in context,” and its ecommerce docs say pages with more internal links pointing at them are generally treated as relatively more important within a site. A pillar linked from every cluster page is exactly that kind of page.
The Shape at a Glance
Here’s an illustrative cluster for a made-up coffee equipment blog. I’ll keep referring back to it, so the labels matter.
| Label | Page | Targets | Links to |
|---|---|---|---|
| P | How to Make Espresso at Home (pillar) | “espresso at home” | C1 to C6 |
| C1 | How to Dial In an Espresso Grinder | grinder settings queries | P, C2 |
| C2 | Espresso Grind Size Explained | grind size queries | P, C1 |
| C3 | Best Coffee Beans for Espresso | bean queries | P |
| C4 | How to Tamp Espresso | tamping queries | P, C5 |
| C5 | Why Is My Espresso Sour? | troubleshooting queries | P, C4, C2 |
| C6 | How to Steam Milk for a Latte | milk queries | P |
Read the last column carefully. Every cluster page links to P. P links to every cluster. Siblings link only where a reader would genuinely want the next step: someone fixing sour espresso (C5) probably needs grind size (C2), while bean picks (C3) don’t need a link to milk steaming (C6).
How Do You Choose a Pillar Topic?
I run every candidate through four checks. A topic needs to pass all four before I’d build a pillar on it.
- It splits into at least six real questions. If you can only think of two subtopics, it’s a single article, not a pillar.
- One page can summarize it. If the overview needs 10,000 words, the topic is too broad. Split it into two pillars.
- People search for the broad term. Check that the head keyword has real demand in Search Console, Keyword Planner or the live results page.
- It connects to what you sell. A pillar pulls links and attention toward itself, so I’d point it at a subject that leads to your service or product.
The fourth check is the one people skip. I’ve seen plenty of blogs build beautiful pillars on subjects that have nothing to do with their offer. They rank, and nobody buys anything.
To find the subtopics themselves, you need a topical map. My step-by-step topical map method handles that part, so I won’t repeat it here.
What Goes on the Pillar Page vs the Cluster Pages?
This split is the most useful table in the post, in my view. Most pillar mistakes come from putting cluster content on the pillar.
| Element | Pillar page (P) | Cluster page (C1 to C6) |
|---|---|---|
| Question it answers | “What is this and how does it fit together?” | One specific question, answered fully |
| Depth per subtopic | A short summary, 2 to 4 paragraphs | The full method, examples and edge cases |
| Target keyword | The broad head term | A narrower query or question |
| Typical sections | Overview, the process or parts, which path fits you, FAQ | Steps, troubleshooting, examples |
| Links out | To every cluster page, inside each summary | To the pillar, plus siblings where natural |
| When to publish | Once several clusters exist to link to | First, in the order readers need them |
The summary rule is the heart of it. On the pillar, each subtopic gets enough to answer “do I need this?” and nothing more. Then a link carries the reader to the cluster that answers “how exactly?”
If your pillar summary for grind size already gives the full method, the cluster page has nothing left to add. That’s how you end up with two pages fighting for one query.
How Should Pillar and Cluster Pages Link to Each Other?
These are the rules I follow. None of them come from Google directly, but every one serves the reader first, and that’s what Google’s link guidance asks for.
| Link | Rule | Where it goes on the page |
|---|---|---|
| Cluster to pillar | Always, once per cluster page | Early, often in the intro: “step 3 of my full process” |
| Pillar to cluster | Always, every cluster | Inside the summary for that subtopic, not in a list at the bottom |
| Sibling to sibling | Only where a reader needs the next step | In the sentence that raises the related question |
| Pillar to service page | Once or twice, where it fits | Near the “should you get help” section |
| Cross-cluster | Allowed when it genuinely helps | Same as sibling links |
A few details matter here. The link from cluster to pillar works best in the opening paragraphs, because it tells the reader where they are in the bigger picture. The pillar’s links belong inside each summary, with descriptive anchors, rather than in a “further reading” dump.
The wording and placement of those links is its own skill, and I cover the routine in my internal linking strategy guide.
Four Real Pillars From Our Own Blog
I don’t have client pillars I can show you, so here are ours. Each one follows the same rules above, but the shape changes with what the searcher wants. All link counts below were true when I wrote this and will grow as we publish.
| Pillar | Layout | How it routes readers |
|---|---|---|
| How to do keyword research for SEO | An 8-step process, plus an “at a glance” table | Every step has its own H3 summary and a “deep guide” link, so the table doubles as a cluster index |
| Ecommerce SEO | The parts of ecommerce SEO, one H3 each, then priorities by store stage | Twelve part summaries, each pointing to one deep guide, from category pages to Merchant Center |
| Topical authority | Definition, a main path, then branches by site type | Says outright that it’s the hub, then links each step to its guide |
| How to do local SEO | A beginner’s 8-step build path | Each step links out where it deserves depth, and the intro points to the separate checklist for audits |
Notice why the layouts differ. “How to do keyword research” is a process query, so that pillar is a sequence of steps. “Ecommerce SEO” is a broad what-is query, so that pillar is a set of parts. Matching the pillar’s shape to the head keyword’s intent is, honestly, the decision I spend most time on.
The return links run the other way too. Our seed keywords guide, for example, opens by calling itself step one of the eight in the keyword research process, with a link to the pillar. When a batch of cluster posts goes live, we update older posts so each new page gets linked, and new pillars pick up links from the cluster posts they summarize.
Pillar Pages and Topic Clusters: Mistakes I See Most Often
Three problems turn up in nearly every content audit I run. The first is the “pillar” that’s really a glossary: a long page of definitions with no links leading anywhere deeper, so readers hit a dead end and Google sees no cluster at all.
The second is a tag archive passed off as a cluster. WordPress happily generates a page listing every post tagged “espresso,” but an automatic list has no summaries, no context and no editorial judgment about what a reader should open next. It’s a directory, not a pillar.
The third is quieter. Clusters get published, but nobody goes back to add them to the pillar. Six months later the pillar summarizes four pages while twelve exist, and the newest work sits orphaned. Fixing that is quick work. Skipping it quietly wastes the whole model.
How Do You Stop a Pillar From Cannibalizing Its Clusters?
Give each page one job and write the targets down before drafting. The pillar owns the broad term. Each cluster owns its narrow query. If two pages on your plan target the same query with the same intent, merge them now, on paper, where it costs nothing.
Then watch the pillar’s summaries. Keep each one short enough that the cluster page is clearly the better answer for the specific question. If Search Console later shows the pillar and a cluster swapping places for one query, my keyword cannibalization guide walks through how to judge whether it’s actually a problem and which fix to pick.
One more prevention trick I use: anchor text. When the pillar links to a cluster, use the cluster’s subject as the anchor. That makes it clear, to readers and to Google, which page owns that subject.
Edge Cases That Change the Build
- A very small site. With fewer than ten posts on a subject, your pillar may be thin. Publish the clusters first and build the pillar once there’s enough to summarize.
- A service business. Your service page often works better as the pillar than a blog post does. Clusters then answer the questions buyers ask before they hire.
- A topic that overlaps two pillars. Pick one home for each cluster page. It can still link to the other pillar, but it reports to only one.
- An old site with scattered posts. Group what you have first, merge duplicates, then write the pillar around the cluster that’s already strongest.
A Build Checklist You Can Copy
Paste this into a plain text file or your project tool, and fill it in before you write anything.
PILLAR TOPIC:
Head keyword (pillar owns this):
Passes 4 checks? (6+ subtopics / one-page summary / search demand / ties to offer)
CLUSTER PAGES (one row per page)
C1 | target query | live or planned | links to P? | sibling links
C2 | target query | live or planned | links to P? | sibling links
C3 | target query | live or planned | links to P? | sibling links
PILLAR SECTIONS
Overview | one summary per cluster | which path fits you | FAQ
CHECKS BEFORE PUBLISHING THE PILLAR
[ ] At least half the clusters are live
[ ] Every summary links to its cluster inside the paragraph
[ ] Every live cluster links back to the pillar near the top
[ ] No two pages share a target query
When Is It Worth Getting Help?
Most sites can build their first cluster without outside help. The hard part comes earlier: choosing the pillar topics and deciding which query each page owns, because mistakes there turn into cannibalization later.
That planning is what our keyword research service covers, including topical maps. And if you want the bigger picture of why clusters matter at all, my guide to topical authority explains it.
Frequently Asked Questions
What Is the Difference Between a Pillar Page and a Cluster Page?
A pillar page gives a broad overview of a subject and links to every page in its cluster. A cluster page answers one narrower question in full and links back to the pillar. The pillar targets the broad keyword, each cluster targets a specific one.
How Long Should a Pillar Page Be?
There’s no required length. It needs enough room to summarize every cluster in a few paragraphs and help readers choose a path. That’s why pillars often run longer than cluster posts, but length comes from the number of subtopics, not from a word target.
How Many Cluster Pages Does One Pillar Need?
I start a pillar once a subject splits into at least six real questions. Some clusters grow to fifteen or twenty pages over time. If a cluster keeps growing past that, it’s often a sign the subject should split into two pillars.
Should I Write the Pillar Page First?
I usually don’t. Publishing several cluster pages first gives the pillar something real to summarize and link to. A pillar with nothing beneath it tends to be a thin overview that’s hard to rank.
Last updated: October 2026 by Mizanur Rahman
