The hierarchy of a website refers to the hierarchical organization of its pages, from the homepage to the deepest content. This structure determines how visitors access information, as well as how search engine bots explore and index the content. With the rise of conversational interfaces and voice search, designing this architecture is no longer limited to a simple outline of categories.
Hierarchy and crawl: what bots read before the content
Even before analyzing the text of a page, search engines crawl the structure of the site. A bot follows internal links to move from one page to another, and the depth of the hierarchy determines the speed of indexing. A page buried five clicks from the homepage will be discovered later, sometimes ignored.
The guide published by Google and analyzed by Adimeo reminds us that the technical fundamentals remain the same, including for optimization aimed at generative AI: a crawl facilitated by the site’s hierarchy, internal linking, and the removal of unnecessary pages. Therefore, the hierarchy is not a tool for editorial planning detached from technical SEO. It is its foundation.
A good way to visualize this structure remains the XML sitemap, which makes the hierarchy explicit for bots. By observing the hierarchy of chapeaumelon.net, we can see how a site can clearly expose its levels of depth and main categories in a format readable by engines.
Page depth and navigation: the trap of overly deep architectures
The depth of a hierarchy is measured by the number of clicks needed to reach any page from the homepage. The common recommendation is not to exceed three levels. In practice, many sites exceed this limit without realizing it, especially after several years of content additions.
When depth penalizes mobile performance
Recent analyses directly link shallow hierarchy and better Core Web Vitals performance. On mobile, each additional click generates a load, a server request, a wait time. Multiplying navigation levels burdens the user journey and degrades performance metrics.
Removing orphan pages or empty categories helps reduce this depth. During a redesign, some sites find that half of their pages received no visits in six months. These dead pages dilute the crawl budget and complicate the structure without adding value.
The three-click rule and its limits
This rule is often cited as an absolute, but it depends on the type of site. An e-commerce site with thousands of product listings cannot fit everything into three levels without creating catch-all categories. The real goal is the coherence of the journey: each click should bring the visitor closer to their answer, not lose them in an unnecessary branch.
Structuring the hierarchy around search intentions
Competitors often approach the hierarchy from the perspective of thematic categories. This is an approach that works for simple showcase sites but shows its limits in light of recent developments in search engines.
The rise of voice search and conversational assistants requires structuring pages around the questions users ask, rather than solely around traditional editorial sections. A user who vocally asks “what type of contract for a freelancer” is not looking for a “Legal” category; they are looking for a direct answer.
Concretely, this means that the hierarchy should reflect intentions:
- First-level pages group the main themes of the site (services, products, resources)
- Second-level pages target specific intentions, formulated as questions or precise needs
- Third-level pages delve into a sub-topic with detailed content, linked by internal links to higher levels
This breakdown also facilitates the work of generative AIs, which extract their answers by following logical and hierarchical structures.
Hierarchy redesign: what really changes traffic
Recent feedback shows that the redesign of the hierarchy is the most underestimated lever during a migration. Many redesign projects focus on design or technology and replicate the old structure identically. Traffic stagnates, sometimes drops.
An effective hierarchy redesign begins with an audit of existing pages. The goal is to distinguish three categories:
- Pages that generate traffic and conversions, to be retained and repositioned in the new structure
- Indexed pages but with no traffic, to be merged or redirected
- Non-indexed or error pages, to be removed with 301 redirects
Internal linking as an extension of the hierarchy
The hierarchy defines the vertical structure of the site. Internal linking creates horizontal connections between pages of the same level or different levels. The two work together. A coherent internal linking structure compensates for a slightly deep hierarchy by offering shortcuts to bots and users.
Contextual links in the body of the text carry more weight than navigation links in the menu. An article that naturally links to a service page transmits SEO weight and guides the reader towards a conversion.
The hierarchy of a website is not a fixed document produced during the design phase to be forgotten later. It evolves with published content, deleted pages, and new search intentions. Regularly reviewing it, at least during each significant content addition, remains the most reliable way to maintain readable navigation for both visitors and engines.