The structure of a website refers to the hierarchical organization of its pages and the links that connect them. This architecture determines how visitors access information and how search engines crawl the content. Before choosing a design or writing a single line, structuring conditions the readability, SEO, and sustainability of the project.
Pillar Pages and Click Depth: The Logic Guiding the Hierarchy
A professional website is not built by stacking pages. It is organized around pillar pages, long and comprehensive content that covers a central topic. Each pillar page serves as an entry point to more specialized sub-pages.
This approach has gained importance since the Google updates of 2023 and 2024. The Core Updates and the Helpful Content update penalize sites that split a single topic into multiple weak URLs more severely. Multiplying insubstantial sub-pages to “cover” as many keywords as possible has become counterproductive.
The current logic encourages simplifying the hierarchy and concentrating value on fewer pages. A visitor should be able to reach any information within three clicks maximum from the homepage. Beyond that, the abandonment rate increases, and indexing bots crawl deep levels less effectively.
In practice, a classic showcase site works well with two levels of depth: the homepage, the main sections (services, about, contact, blog), and then the sub-pages. An e-commerce site may require a third level for product categories, but rarely more. You can explore the site bestweb.fr in detail to see how this hierarchy logic translates into a real sitemap.
Thematic Silo Structure: Organizing Content for SEO
The concept of thematic silo involves grouping pages by topic and limiting cross-links between distinct silos. Each silo contains a pillar page and its sub-pages, interconnected by a tight internal linking structure.
This organization sends a clear signal to search engines: the site addresses a topic in depth, with semantic coherence between the linked pages. Google better understands the overall theme of the site and can assign greater relevance to each page in the silo.
Internal Linking Between Pages of the Same Silo
Internal linking is not just about placing links randomly in the text. Within a silo, each sub-page links back to the pillar page and to the other sub-pages in the same group. The pillar page distributes SEO “juice” to the sub-pages.
- Each internal link uses a descriptive anchor that includes a keyword from the target page, not a generic “click here”
- Links between different silos remain rare and preferably go through pillar pages, not sub-pages
- The breadcrumb trail reflects the hierarchy of the silo and helps the visitor orient themselves within the structure
A well-thought-out linking structure reduces the effective depth of the site. Even if a page is technically at the third level, a contextual link from the homepage or a pillar page makes it accessible in one click.
Accessibility and HTML Structure: What Regulatory Requirements Change
The European directive on web accessibility imposes requirements that directly affect the structure of pages. Headings must follow a strict HTML hierarchy (H1, H2, H3 without skipping levels). Menus must be navigable via keyboard. Images must have descriptive alt attributes.
These constraints do not only concern public sites. Since recent national transpositions, an increasing number of professional sites in the private sector fall under these obligations. Ignoring accessibility when creating the site leads to costly redesigns a few months later.
Semantic Tags and Keyboard Navigation
Structuring a site accessibly also means using the right semantic HTML tags: nav for navigation, main for main content, footer for the footer. These tags allow screen readers to provide navigation shortcuts.
- The breadcrumb trail becomes a reference point for users of assistive technologies, not just an SEO tool
- Contact forms structured with
labelassociated with fields facilitate input for all user profiles - A logical tab order (corresponding to the visual order of elements) prevents losing users who navigate without a mouse
Accessibility improves organic SEO as a side effect. The same practices (hierarchical headings, structured content, alt attributes) benefit both indexing bots and human readers.
Organization of Editorial Content on a Professional Website
The technical structure is not enough if the content itself lacks logic. Each page must have a unique objective. A “services” page that mixes company presentation, customer testimonials, and quote forms loses effectiveness.
The operational rule: one page per search intent. If a visitor types “web agency rates” and another “web agency portfolio,” these two queries deserve two distinct pages with targeted content.
The Blog as a Structural Extension
A professional blog is not a personal diary. Each article targets a long-tail keyword and fits into an existing thematic silo. An orphan article, without a link to a pillar page, loses a significant part of its SEO potential.
The editorial calendar aligns with the site’s hierarchy. Publishing an article weekly without thematic coherence dilutes the site’s authority on its main topics. It is better to publish less frequently with a clear connection to a silo.
The structure of a professional site is determined before the first pixel. The silo structure, the limitation of click depth, adherence to accessibility standards, and alignment of content with specific search intents form a technical foundation that design then dresses up. A site with a shaky structure from the start cannot be salvaged with a graphic redesign.
