Siloing SEO
Groups related pages into tightly connected topical sections so search engines can more clearly understand a site’s central themes and improve relevance.
If you have ever built silos around keyword lists instead of real user intent, you already know the structure needs a deeper basis.
Key points
- Audit existing content and group by topic before applying siloing.
- Limit cross-silo links; add them only when they clearly help the reader.
- Ensure at least five supporting pages per silo for sufficient depth.
- Treat siloing as an ongoing architecture tactic, not a one-time fix.
A content audit that reshaped a site's architecture
A mid-size e‑commerce site had 200 product pages spread across five unrelated categories. After a content audit, the team grouped pages by user intent—'buy running shoes' and 'learn about trail running'—into two silos. They created a pillar page per silo, linked each pillar to 8–12 supporting pages, and removed cross‑silo navigation links. Within three months, organic traffic to the pillar pages grew 40% and supporting pages saw better click depth distribution.
Three ways siloing changes your site architecture
- Topical focus By grouping pages around one theme, search engines can more clearly associate your site with that topic, potentially improving relevance signals. When planning an seo for website redesign, this helps define clear topic areas.
- Internal link flow A silo directs link equity within a vertical, strengthening the pillar page and making it easier for deeper pages to gain authority.
- Crawl efficiency Silos reduce crawl noise by giving search bots a logical path; they can discover supporting pages without wandering into unrelated sections.
Three common mistakes that weaken silos
- Excessive cross‑linking Linking across silos dilutes the topical boundaries. Only link to another silo when it serves a clear user need. For a client SEO project, maintaining separation is vital.
- Too few supporting pages A silo with fewer than five supporting pages can appear as a thin section, undermining the structure’s value.
- Ignoring navigation Global nav, footer, or sidebar links that point broadly across sections can break silo separation. Review all persistent links.
Common questions
What is silo structure in SEO?
It’s a site architecture tactic that groups related pages by topic and links them internally to reinforce relevance.
How does siloing differ from content clusters?
Siloing is an older term for a similar concept; modern approaches often use pillar pages and clusters with more flexibility.
Does siloing still matter in 2024?
Yes, but many sites now use hybrid architectures that allow some cross‑linking when it aids user experience.
Sources
- Google Search Central Official Google guidance on site structure and crawling
- Bruce Clay In-depth article on siloing implementation
- Google Search Central Blog Updates on best practices for site architecture