Site Architecture
In one line
Site architecture is how you organise pages into categories and connect them via internal links — the structure that tells both search engines and AI what your site is really about.
Going deeper
Site architecture covers both the category-and-subcategory tree all the way down to page level and the internal link graph layered on top. The classic advice — keep things flat (within three clicks), organise into topical clusters — works because it helps bots see what your site is mainly about and matches how humans browse.
A clean architecture acts as a topical authority signal in itself. If you cover GEO, hub-and-spoke around a GEO pillar page is far stronger than scattering articles across an unstructured pile of categories, where no single topic ends up obviously dominant.
AI search raises the stakes. LLMs lean on inter-page relationships when they form a model of what a domain is for. Sites with chaotic architecture often end up cited under the wrong category, even when the underlying content is fine.
Related terms
Internal Linking
Internal linking is the practice of connecting pages within the same domain — and it shapes crawl efficiency, how authority flows between pages, and how users move through the site.
SEOTopical Authority
Topical authority is the credit a domain earns when search engines decide it covers an entire subject area deeply and consistently — not just one or two posts.
SEOPillar Page
A pillar page is the hub at the centre of a topic cluster — a broad page on a large theme that interlinks with the narrower cluster pages around it.
SEOCrawl Depth
Crawl depth is how many clicks it takes to reach a page from the homepage — the deeper a URL sits, the lower its crawl priority and perceived importance tend to be.
SEOContent Cluster / Pillar Page
A content cluster is a structure where a pillar page covers a broad topic and supporting cluster posts answer its sub-questions, all tied together with internal links.
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