Internal Link Architecture: Building a Silo Structure That Works

What Silo Architecture Actually Means

A silo structure groups related content under topic pillars and links primarily within the group. The idea is that authority flows down from the pillar page to supporting articles, and lateral links stay inside the silo.

Done right, your pillar page ranks for the broad term and your supporting pages rank for long-tail variations. Google sees the cluster and understands you're an authority on that topic. For a complete guide on building content clusters that dominate search, see our topical authority guide.

The Physical vs. Logical Silo Debate

Physical silos use URL structure to enforce grouping: /seo/technical-schema-guide/. Logical silos only use internal links — the URL structure doesn't matter.

Google has said URL structure is a weak signal. From my experience both work, but logical silos are more flexible. You can restructure them without redirects.

How Many Links Per Page?

There's no magic number, but here's what I've observed: pillar pages with 15-30 links to supporting content perform better than pages with 5 links. The supporting pages should link back to the pillar — not always, but at least 60% of the time.

The ratio matters more than the count. For every 10 internal links on a page, about 7 should stay within the silo. The other 3 can go to other silos or the homepage.

The Footer and Nav Trap

Don't put every page in the main navigation. That dilutes the link equity. Your nav should only contain pillar pages and top-level categories.

Footer links are even worse for authority flow. Google devalues them because every page has the same footer. Use the footer for utility pages (contact, privacy, about) — not content pages.

Auditing Your Current Architecture

Use screaming frog or Sitebulb to crawl your site and export all internal links. Look for:

• Orphan pages (zero internal links pointing to them)
• Pages with too many links (200+ dilutes authority per link)
• Topic clusters that spread links across too many silos

I find orphan pages in 90% of audits. Fixing that alone often moves traffic within weeks. A page with zero internal links might as well not exist for Google.

Related Articles

• Topical Authority: Building Content Clusters That Dominate Search