Web & SEO
What is site architecture?
Site architecture is the way a website's pages are organized into groups and connected by internal links, determining how visitors and crawlers move through it.
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Technical definition
Site architecture covers page hierarchy, URL structure, navigation, and internal linking. A flat architecture keeps every important page within about three clicks of the homepage. A deep architecture buries pages under several levels of category, which reduces both the link authority they receive and the likelihood that crawlers reach them often.
Grouping related pages into topic clusters, with a broad overview page linking down to specific ones and each specific page linking back up, is the structure search engines most reliably interpret as subject coverage.
In plain terms
It is the floor plan. Which pages exist, which ones sit under which, and how you get from any one of them to another.
A visitor should be able to reach anything that matters in three clicks or fewer. So should a search engine.
Why it matters
Architecture decides what your site can rank for. A business with one services page mentioning eight services has one page competing for eight different searches, and it will lose most of them to competitors with a dedicated page each.
It also decides where your authority goes. Internal links pass value, and pages that nothing links to receive almost none. The practical version of this is dull and effective: group your pages by subject, give each real offering its own page, link from the overview down to each one, and link each one back to the overview. Do that and the structure carries the ranking work without any further effort.
