Topical authority isn’t built by publishing a lot of blog posts. It’s built by publishing the right posts, connected to each other in a deliberate structure. That structure is a content cluster: one pillar page covering a topic broadly, and a set of spoke posts that each go deep on one sub-topic and link back to the pillar. I use this model on every SEO-focused site I manage, including this one.
A content cluster is a structured group of pages built around one main topic, with a central pillar page and supporting subtopic pages (spokes) that interlink.
Pillar and Spoke, in Plain Terms
A pillar page is the hub — broad enough to rank for the head term, comprehensive enough to answer the main questions a reader has, and structured so every sub-topic it mentions has (or will have) its own dedicated post. A spoke post is narrow and specific: it answers one question in real depth, then links back to the pillar and sideways to related spokes.
Google reads this structure as a signal that you actually know the subject in depth, not just well enough to write one 800-word overview. The internal linking pattern also distributes ranking signals across the cluster instead of leaving each post to rank on its own.
How I Plan a Cluster Before Writing Anything
1. Start With the Pillar Topic, Not the Keyword List
I pick the broad topic a client (or my own site) genuinely wants to be known for, then map out the 4-8 sub-topics a reader would naturally ask about next. For example, “domain authority vs topical authority” as a pillar naturally branches into content cluster strategy, entity SEO, E-E-A-T signals, and internal linking — each deserving its own post rather than a paragraph buried in the pillar.
2. Map Search Intent Per Spoke
Each spoke should match a distinct intent — informational, comparison, how-to — rather than duplicating what another spoke already covers. If two planned posts would answer the same question from the same angle, merge them.
3. Sequence Publication, Don’t Dump It All at Once
I publish the pillar first (even if it launches with a few “coming soon” internal link placeholders), then release spokes over following weeks. This lets me update the pillar’s internal links as each spoke goes live, and gives Google a steady signal of ongoing activity in that topic area rather than one burst.
4. Interlink Deliberately, Not Automatically
Every spoke links up to the pillar. Related spokes link sideways to each other where genuinely relevant — not forced. I keep a running note of exactly which posts exist and their live slugs before I add any internal link, so I’m never linking to a URL that doesn’t exist yet.
Signs a Cluster Is Working
- The pillar page starts ranking for more long-tail variations over time, not just its exact target keyword
- Spoke posts get impressions for queries adjacent to their main keyword — a sign Google understands the topical relationship
- Average position on the pillar improves after 2-3 spokes go live, even without new links to the pillar itself
Common Cluster Mistakes
- Publishing spokes with no link back to the pillar — this breaks the entire point of the structure
- Writing a pillar so long it duplicates spoke content instead of summarizing and linking out
- Letting a cluster go stale — a pillar published months ago with unlinked or unfinished spokes signals abandoned effort, not authority
- Choosing spoke topics by keyword volume alone instead of what a reader actually needs to trust the pillar’s claims
Why This Matters More Now
As AI-driven search and answer engines pull from clusters of related content to establish what a site is “about,” a well-structured cluster does double duty: it helps traditional rankings and it helps your content get cited as a coherent source rather than a scattered collection of unrelated posts.
Planning a content cluster for your site?
I’ll help you map pillar and spoke topics that actually build authority, not just publish volume.
FAQ
How many spoke posts does a content cluster need?
There’s no fixed number — I usually plan 4 to 8 spokes per pillar. What matters is that each spoke covers a genuinely distinct sub-topic rather than padding the cluster to hit a count.
Should the pillar page or the spoke posts be published first?
I publish the pillar first, even if some internal links point to spokes that aren’t live yet. It establishes the topic structure early and gives you a page to update as each spoke goes live.
Does content cluster strategy replace keyword research?
No, it builds on it. Keyword research tells you what people search for; cluster strategy tells you how to organize your answers so the whole topic — not just individual keywords — gets recognized.
