site-architecture

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
URL Structure Design
Navigation Architecture
Silo Structure and Topic Clusters
Internal Linking Strategy
Crawl Equity Management
Architecture Audit Framework
Restructuring Playbook
Architecture Patterns by Site Type
Common Mistakes
Output Artifacts
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           spokes

Building 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 page link High Pillar page linking to all its spokes

3 Navigation link Medium Sitewide, consistent, but diluted by ubiquity

4 Breadcrumb link Medium Upward equity flow, consistent

5 Footer link Low Sitewide, Google discounts these

6 Sidebar link Low Often not in main content flow

Anchor Text Strategy

Type Example Usage Signal Strength

Partial match "effective cold email strategies" Primary approach (60-70% of links) Strong

Exact match "cold email templates" Use sparingly (10-15% of links) Strong but risky if overused

Branded "our email guide" Natural variation (10-15%) Moderate

Descriptive "this comprehensive guide" Natural variation (5-10%) Weak but natural

Generic "click here", "learn more" Avoid (< 5%) None -- wasted signal

Naked URL https://example.com/guide

Never for internal links None

Orphan Page Detection and Resolution

An orphan page is indexed in Google but has zero inbound internal links. It is invisible to the site's link graph.

Detection method:

Export all indexed URLs (GSC Coverage or site: query)
Export all internal link targets (crawl tool or link extraction)
Pages in set A but not set B are orphans

Resolution actions:

Orphan Type Action

Valuable content, belongs in a silo Add contextual links from 3+ related pages

Old content, still relevant Link from hub page and 1-2 spokes

Outdated content, no value Redirect to relevant page or noindex

Utility page (shouldn't be indexed) Add noindex

Internal Linking Audit Checklist

Check Pass Criteria

Every content page has 3-5 outbound internal links No page links only to itself or navigation

Every target page has 3+ inbound internal links No orphans in the indexed set

Hub pages link to all their spokes Complete coverage

Anchor text is descriptive and varied No > 30% exact match for any keyword

No broken internal links 0 broken links

Link depth from homepage < 4 clicks 95%+ of pages within 3 clicks

Crawl Equity Management

Homepage Equity Distribution

The homepage is your highest-equity page. Use it wisely.

Homepage Link Target Priority

Hub/pillar pages (top of each silo) Highest -- link from homepage content area

Key product/service pages High -- link from homepage or primary nav

Top-performing content Medium -- link if contextually relevant

Utility pages (contact, about) Low -- footer links only

Blog index Medium -- primary or secondary nav

Crawl Budget Allocation

Page Category % of Crawl Budget Optimization

Money pages (product, pricing, features) 20-30% Internal link from homepage + nav

Pillar content (hub pages) 20-30% Extensive internal linking

Spoke content (blog, guides) 30-40% Linked from hubs + contextual

Utility pages (about, contact, legal) 5-10% Footer links only, minimal crawl

Tag/archive/pagination < 5% Noindex if thin, limit crawling

Architecture Audit Framework

Audit Scorecard

Dimension Weight Check

Crawl depth 20% 95%+ pages within 3 clicks of homepage

Orphan pages 20% 0 orphan pages in indexed set

URL cleanliness 15% Clean, descriptive, consistent URLs

Navigation completeness 15% All key pages accessible via primary/secondary nav

Internal link coverage 15% Every page has 3+ inbound internal links

Silo coherence 10% Topic clusters are well-defined with clear hub-spoke relationships

Breadcrumb implementation 5% Present on all non-homepage pages with schema

Red Flag Indicators

Signal Severity Action

Pages > 3 clicks from homepage High Create shortcuts via nav or hub page links

Hub page has no content (just links) High Add pillar content to all hub pages

Generic anchor text dominant (> 30%) Medium Rewrite anchor text to be descriptive

No breadcrumbs on deep pages Medium Implement breadcrumbs with BreadcrumbList schema

Sitemap includes noindex pages Medium Filter sitemap to only indexable pages

Primary nav links to utility pages Low Move Contact/Privacy to footer

Footer contains 50+ links Low Reduce to 8-15 key pages

Restructuring Playbook

When to Restructure

Signal Restructure? Alternative

Complete URL overhaul needed Yes

Adding 3 new sections Partial -- new sections only

Fixing orphan pages No Add internal links, no URL changes needed

Improving nav No Update navigation, keep URLs

Moving to new CMS Yes (usually) Keep URL structure if CMS supports it

Restructuring Steps

Crawl current site -- Export all URLs, internal links, and rankings
Map current to new -- Create 1:1 URL redirect mapping
Build redirect rules -- 301 redirects for every changed URL
Chain existing redirects -- Update old redirects to point to final destination
Update internal links -- Point to new URLs (do not rely on redirects for internal links)
Update sitemap -- Reflect new URL structure
Monitor for 60 days -- Watch for crawl errors, ranking changes, traffic impact

Architecture Patterns by Site Type

SaaS Website

/ Homepage ├── /features/ Features hub │ ├── /features/analytics Analytics feature │ └── /features/reporting Reporting feature ├── /solutions/ Solutions hub (by use case) │ ├── /solutions/marketing Marketing use case │ └── /solutions/sales Sales use case ├── /integrations/ Integrations hub │ ├── /integrations/slack Slack integration │ └── /integrations/salesforce Salesforce integration ├── /pricing Pricing page ├── /blog/ Blog index │ ├── /blog/seo-guide Blog post │ └── /blog/growth-tips Blog post ├── /docs/ Documentation └── /about About page

E-commerce Site

/ Homepage ├── /[category]/ Category page (with content) │ ├── /[category]/[subcategory]/ Subcategory (with content) │ │ └── /[category]/[subcategory]/[product] Product page │ └── /[category]/[product] Product (if no subcategory) ├── /brands/ Brand hub │ └── /brands/[brand] Brand page ├── /blog/ Content hub └── /sale/ Promotions hub

Content/Media Site

/ Homepage ├── /[topic]/ Topic hub (pillar content) │ ├── /[topic]/[subtopic] Subtopic article │ └── /[topic]/[guide] In-depth guide ├── /authors/ Author hub │ └── /authors/[name] Author page ├── /tools/ Free tools hub │ └── /tools/[tool] Individual tool └── /newsletter Newsletter signup

Common Mistakes

Mistake Why It Hurts Fix

Orphan pages No equity flows in, Google deprioritizes Add contextual internal links from related content

URL changes without redirects Lost link equity and broken backlinks Always 301 redirect old URLs

Deep nesting (4+ levels) Diluted crawl equity, confusing UX Flatten structure

Empty category pages Thin pages do not rank Add pillar content to all category/hub pages

Homepage linking to nothing Wastes highest-equity page Link from home to all hub pages

Footer with 100+ links Dilutes equity across too many targets Limit footer to 8-15 key pages

Navigation not matching user mental model Users leave, engagement drops Run card-sort testing with real users

Dynamic parameter URLs Creates duplicate content Canonicalize or block with robots.txt

Sitewide sidebar links to every post Diluted equity, adds noise Remove or limit to "popular" posts

Output Artifacts

Artifact Format Description

Architecture Audit Scorecard Weighted score table Per-dimension scores with red flag indicators

Site Tree Diagram Text-based hierarchy Visual URL structure with annotations

URL Specification Table Table URL pattern, title template, parent page, schema type per section

Internal Linking Plan Hub-spoke map Topic cluster map with anchor text guidelines and orphan fix list

Redirect Map Before/after URL table 1:1 mapping for URL restructuring with 301 implementation

Navigation Spec Zone-by-zone design Primary, secondary, breadcrumb, footer, and contextual nav plans

Related Skills

seo-audit -- For comprehensive SEO audits where architecture is one of several problem areas. Use seo-audit for the full picture, site-architecture for deep structural work.
schema-markup -- For adding BreadcrumbList and other structured data after architecture decisions are finalized.
programmatic-seo -- For hub-and-spoke structures at scale when generating hundreds of template-based pages.
content-creator -- For creating the pillar content that hub pages need to rank effectively.