Site Architecture & Internal Linking
Production-grade website architecture framework covering URL hierarchy design, internal linking strategy, navigation optimization, silo structure, and crawl equity management. Handles architecture audits, new site planning, and restructuring existing sites.
Table of Contents
- [Operating Modes](#operating-modes)
- [URL Structure Design](#url-structure-design)
- [Navigation Architecture](#navigation-architecture)
- [Silo Structure and Topic Clusters](#silo-structure-and-topic-clusters)
- [Internal Linking Strategy](#internal-linking-strategy)
- [Crawl Equity Management](#crawl-equity-management)
- [Architecture Audit Framework](#architecture-audit-framework)
- [Restructuring Playbook](#restructuring-playbook)
- [Architecture Patterns by Site Type](#architecture-patterns-by-site-type)
- [Common Mistakes](#common-mistakes)
- [Output Artifacts](#output-artifacts)
- [Related Skills](#related-skills)
Operating Modes
Mode 1: Audit Current Architecture
Existing site needs structural assessment. Analyze depth distribution, orphan pages, link equity flow, and navigation effectiveness.
Mode 2: Plan New Architecture
Building from scratch or full redesign. Map business goals to site sections, design URL hierarchy, plan navigation, and define content silos.
Mode 3: Internal Linking Optimization
Structure is fine but link equity flow needs improvement. Identify hub pages, map spoke content, fix orphans, and optimize anchor text.
Mode 4: URL Restructuring
Changing URLs on an existing site. Plan the new structure, build redirect maps, and manage the migration.
URL Structure Design
Depth Guidelines
| Depth | Example | Use When | SEO Impact | |-------|---------|----------|------------| | 1 level (flat) | /cold-email-tips | Blog posts, standalone pages | Best crawl equity per page | | 2 levels | /email-marketing/cold-email-tips | Category is a rankable page itself | Good, category page accumulates authority | | 3 levels | /solutions/marketing/email-automation | Product families, nested services | Acceptable if each level has content | | 4+ levels | /a/b/c/d/page | Never | Diluted equity, poor UX, crawl issues |
Decision rule: If the intermediate directory URL (/email-marketing/) will NOT be a real page with its own content and ranking target, do not create the directory. Flat is better than empty hierarchy.
URL Construction Rules
| Rule | Good | Bad | Why | |------|------|-----|-----| | Use hyphens | /seo-audit | /seo_audit | Underscores are not word separators for Google | | Be descriptive | /pricing | /pricing-page | Redundant suffixes add nothing | | Keep short | /guides/technical-seo | /guides/technical-seo-audit-checklist-complete-guide | Readability matters | | Include keyword | /guides/seo-audit | /guides/article?id=4827 | Descriptive URLs rank better | | Be consistent with trailing slashes | Pick one: /about or /about/ | Mix of both | Inconsistency creates duplicate content | | Use lowercase | /about-us | /About-Us | Case sensitivity varies by server |
URL Patterns by Site Type
| Site Type | Pattern | Example | |-----------|---------|---------| | SaaS | /features/[feature], /solutions/[use-case], /integrations/[partner] | /features/analytics, /solutions/marketing, /integrations/slack | | E-commerce | /[category]/[subcategory]/[product] | /mens/shoes/running-shoes-pro | | Blog/Content | /blog/[slug] or /blog/[category]/[slug] | /blog/seo-audit-guide | | Local business | /[service]/[location] | /plumbing/austin-tx | | Documentation | /docs/[section]/[page] | /docs/api/authentication | | Marketplace | /[category]/[listing] | /designers/john-smith |
Navigation Architecture
Navigation Zones
Every site has 6 navigation zones. Each serves a different purpose and carries different SEO weight.
| Zone | Items | SEO Weight | Design Rule | |------|-------|------------|-------------| | Primary nav | 5-8 items max | High (sitewide equity) | Only pages you want to rank for. Never "Resources" without a landing page. | | Secondary nav | 3-7 per section | Medium | Sub-navigation within a section/silo | | Breadcrumbs | Dynamic | High (upward equity) | Every non-homepage page. Each segment must be a real link. | | Footer nav | 8-15 items max | Low-Medium | Key pages only. Not a dumping ground for every page. | | Contextual (in-content) | 3-5 per page | Highest | Most powerful signal. Natural editorial links within body content. | | Sidebar | 5-10 items | Low-Medium | Related content, category listing |
Primary Navigation Design
Rules:
- 5-8 items maximum. Cognitive overload starts at 9+ items.
- Every nav item links to a page you actively want to rank.
- Dropdown menus are fine, but the parent item must be a clickable, crawlable link (not just a hover trigger).
- Do not put utility pages (Contact, Privacy, Terms) in primary nav -- they belong in the footer.
- Mobile nav must expose the same structure as desktop nav (no hidden critical pages).
Breadcrumb Implementation
Add breadcrumbs to every non-homepage page. They serve three functions:
- UX: Show users their location in the hierarchy
- SEO: Create sitewide upward internal links to hub/category pages
- Rich results: Enable BreadcrumbList schema for SERP breadcrumbs
Format: Home > Category > Subcategory > Current Page
Rules:
- Every breadcrumb segment must be a real, crawlable link
- Never use breadcrumbs as styled text without links
- Add BreadcrumbList schema markup alongside visible breadcrumbs
- Breadcrumb hierarchy should match URL hierarchy
Silo Structure and Topic Clusters
Hub-and-Spoke Model
A silo is a self-contained cluster of content about one topic, where all pages link to each other and to a central hub page.
┌──────────────────┐
│ HUB PAGE │
│ /seo/ │
│ (Pillar content)│
└────────┬─────────┘
┌────────────────┼────────────────┐
┌────┴────┐ ┌───┴────┐ ┌────┴────┐
│ SPOKE 1 │ │ SPOKE 2│ │ SPOKE 3 │
│technical│ │on-page │ │ link │
│ seo │ │ seo │ │building │
└────┬────┘ └───┬────┘ └────┬────┘
│ │ │
Cross-links Cross-links Cross-links
between between between
related related related
spokes spokes spokesBuilding Topic Clusters
Step 1: Identify 3-7 core topics for your site (these become your silos)
Step 2: For each topic, create one pillar page (the hub) that covers the topic broadly
Step 3: Create spoke content for each major sub-question or sub-topic
Step 4: Implement linking:
- Hub links DOWN to every spoke
- Every spoke links UP to the hub (with keyword-rich anchor text)
- Spokes link ACROSS to related spokes within the same silo
- Cross-silo links are fine when contextually genuine
Step 5: Build the content before building the links. Links to non-existent content are useless.
Silo Depth Guidelines
| Silo Size | Recommended Depth | Structure | |-----------|------------------|-----------| | 3-5 spokes | Flat | Hub + spokes, all at same level | | 6-15 spokes | Shallow nested | Hub > Sub-hubs > Spokes | | 16-50 spokes | Two-level | Hub > Category sub-hubs > Individual spokes | | 50+ spokes | Paginated | Hub > Category sub-hubs > Paginated spoke listings |
Internal Linking Strategy
Link Equity Power Stack
Not all internal links carry equal weight. From most to least powerful:
| Rank | Link Type | Weight | When to Use | |------|-----------|--------|-------------| | 1 | In-content contextual link | Highest | Natural editorial links within body copy | | 2 | Hub