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What is a content hub? Definition and how it is structured

Content hubs are curated sets of pages about one subject, organised around a central page that frames it and wired together with deliberate internal links, so a reader can enter anywhere and find the rest and a search engine can see the whole set from one place.

Last reviewed August 30, 2026 · 6 min read

Two things travel under the name. This page is about the content-marketing and SEO sense. The other is enterprise software — HubSpot's Content Hub, Sitecore's Content Hub and similar asset-management or CMS products. Same words, unrelated subject; if a page talks about asset libraries and approval workflows, it means that one.

How a hub is structured

Ahrefs' definition covers the parts in a phrase: content hubs are "interlinked collections of content about a similar topic", made of a hub page, cluster pages beneath it, and hyperlinks running in both directions. Semrush names the same three parts as hub and spokes — "a main pillar page focused on providing an overview of a broad topic to serve as the center of the hub. And spokes (the cluster pages) that each cover one of the subtopics in greater detail."

Search Engine Journal's wheel image is the one that sticks: the hub is the centre, targeting the broad, competitive term you want authority on; the spokes are supporting pages, each taking a longer, more specific query. The linking is not decoration. As its guide puts it, internal linking and navigation should be "set up in a way where Google and the user easily understand the relationship of the content" — hub down to every spoke, every spoke back up, related spokes across where it genuinely helps.

One structural detail distinguishes a hub from the older SEO silo. Ahrefs' glossary is precise: a hub is "a collection of interrelated and interlinked content, all centered around a specific topic. While very similar to SEO silos, content hubs do not restrict linking to pages outside the hub." A silo tries to seal link equity inside a section. A hub does not, and the difference matters, because a page forbidden from linking to the most relevant thing on the site is a worse page.

What a hub is not

Not a blog category. A category is an automatic archive of everything tagged a certain way, in reverse date order, with no framing behind it. A hub is curated: something was left out, the pages were ordered on purpose, and a person wrote the page explaining why the subject matters. The category page is a filter; the hub page is an argument.

Not a pillar page. The pillar page is the hub's central page. The hub is the whole thing — that page, the spokes, and the navigation binding them. People use the two words interchangeably, including some of the sources above, and it rarely causes trouble in conversation. It causes trouble when someone believes they have built a hub because they published a 4,000-word overview with nothing beneath it.

Not a landing page. A hub sends people onward; a landing page keeps them.

Building one on a small site

  1. Pick a subject you can exhaust. One where you can list fifteen to twenty questions a customer actually asks. Ahrefs' criterion for subtopics is that they carry informational intent and search traffic potential, with roughly five to twenty related areas underneath.
  2. Write the hub page. Overview depth, honest opinions, a clear map of what sits beneath it. It has to stand up on the day it ships, when it links to nothing.
  3. Publish the spokes on a schedule. One subtopic per page, one query per page. This is the part that takes a year and the part that decides whether the hub exists.
  4. Link both ways, every time. Add each new spoke to the hub page and link the spoke back the day it publishes. Retrofitting this later is the single most-skipped job in content marketing.
  5. Give it a way in. A navigation entry, a homepage slot, a footer link. A hub nobody can reach from the site is a folder.
  6. Maintain it. Semrush ends its six-step process on the same note, and it is the right place to end: a hub decays like anything else, and the central page decays fastest because it claims the broadest ground.

Why they work

Three reasons, in descending order of reliability. Coverage: a set of pages answering every angle of a subject is what topical authority is made of, and internal linking is how a search engine sees that the set is a set. Links: a hub is a more linkable object than any single post — Ahrefs' examples put Zapier's remote-work hub at over a thousand linking websites and Drift's chatbot hub at more than five hundred, with internal links spreading that authority to the pages underneath. Readers: someone arriving at one spoke from search has an obvious next page, which is the difference between a visit and a session. The section you are reading is itself a hub.

How Structura handles this

Structura builds the spokes. A campaign is one topic space with its own positioning, objective, author persona and a keyword bank grounded in real search volume; it publishes one post per keyword on a cadence, with a ledger so no subtopic is written twice, and links each new post into the pages your site already has — the hub page included, once it exists. That is the half of a hub that fails by attrition. Nobody abandons a hub because the central page was hard; they abandon it in month four of the twenty spokes.

It does not write the hub page, and it does not build your navigation. The central page states what your business thinks about the subject and decides what belongs in the set — a curation job, and the one page in a hub genuinely worth a person's afternoon. Menus, section templates and internal navigation live in your theme or your front end, outside anything a publishing tool touches.

The honest division: you choose the subject, write the central page and give it a route in from the site; Structura fills the shelf behind it and keeps the links current as it grows. Grow with content covers how a campaign is set up around one topic space.

FAQ

What is the difference between a content hub and a pillar page?

Scope. The pillar page is one URL — the central overview that takes the broad query and routes readers deeper. The content hub is the whole structure: that page, the cluster pages beneath it, the links running both ways, and the navigation that makes it reachable. A pillar page with no cluster behind it is just a long article, which is the most common way the distinction gets lost.

How many pages does a content hub need?

Enough to genuinely cover the subject, which for most small businesses means somewhere between ten and twenty-five. Ahrefs suggests choosing hub topics with roughly five to twenty related subtopics beneath them, and that range holds up in practice: fewer than five and a single well-structured page would have done the job better; beyond twenty-five you are usually looking at two subjects that should each have their own hub.

Is a content hub the same as a topic cluster?

In practice, yes — both describe the same arrangement of a central page, subtopic pages and reciprocal internal links, and the sources above use them almost interchangeably. If there is a shade of difference, "topic cluster" describes the SEO structure while "content hub" implies a designed destination readers can browse. Not worth arguing about; worth noticing when a supplier charges differently for each. Tools that generate a whole cluster in one run — Machined AI is the best-known, and our Machined AI review covers it — produce the structure but not its upkeep; the hub still needs pages added and links refreshed after the batch lands.

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