Silo structures: myth vs reality
The 'silo' is one of SEO's most over-applied ideas: group your content into rigid topical silos and sever cross-links between them to keep each topic 'pure'. The grain of truth — that topical grouping helps — got inflated into a rule that does real damage. This guide separates what's genuinely true about siloing from the cargo-cult version, and lands on a structure that helps both rankings and users without the dogma.
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What people mean by a silo
The classic silo model groups pages into topical sections and restricts linking so that pages link mostly within their silo and rarely across. In its strict form it's prescriptive: cross-links between silos are treated as leaks that 'dilute' topical focus and should be removed. It's often enforced through URL structure and navigation as much as internal links.
STRICT SILO (myth) CLUSTERS + relevant cross-links
(reality)
TopicA TopicB TopicA TopicB
| | | | | | [pillarA]----[pillarB]
a b c d e f / | \ relevant / | \
(walled off; NO a b c <-------> d e f
cross-links allowed) (linked where genuinely
relevant; pillars connect)What's actually true
There's a real, defensible core under the hype, and it's just topic clusters by another name:
- chevron_rightTopical grouping helps. Pages on a subject linking to each other around a pillar builds demonstrable coverage and concentrates authority on the right page — genuinely useful.
- chevron_rightRelevance-based linking is good. Linking pages that are actually related, with descriptive anchors, sends clear signals. The silo instinct to link within a topic is right as far as it goes.
- chevron_rightStructure aids crawling and understanding. A coherent hierarchy helps search engines (and users) understand how your content fits together.
What's myth
“Cross-links between topics dilute authority and must be cut.” This is the damaging part. A relevant link between two topics doesn't 'leak' authority harmfully — it routes it where it's useful and helps users. Severing genuinely helpful cross-links to preserve silo 'purity' hurts both UX and the authority flow you were trying to optimise.
“Silos are mainly a URL/folder structure.” Topical grouping lives in the internal link graph, not the URL path. Reorganising folders without fixing links is cargo-cult siloing — see how clusters are detected.
“More rigid = more SEO benefit.” Past the point of sensible topical grouping, rigidity only removes useful links. There's no bonus for strictness; there's a penalty in lost relevance signals and worse navigation.
What to do instead
- Build clusters, not walls: pillar plus supporting pages, linked up and down, for each major topic.
- Let the dominant linking be topical — most of a page's contextual links will naturally be to related pages anyway.
- Allow relevant cross-links between topics freely. If linking from a TopicA page to a TopicB page genuinely helps the reader, do it. Bridge pages that span topics are an asset, not a violation.
- Connect pillars to each other where topics relate, so authority and users can move between adjacent subjects — and watch for cannibalization within a topic, which a rigid silo can actually hide.
The honest summary: Keep the topical grouping a silo gets right; drop the link-severing dogma it gets wrong. You want clusters with permeable, relevance-based connections — not airtight compartments.
FAQ
Are SEO silos still effective in 2026?expand_more
The useful part — grouping content topically into clusters with internal links — is as effective as ever, because it's just topic clusters. The harmful part — rigidly cutting cross-links between topics to keep silos 'pure' — was never a real ranking benefit and hurts users. Build clusters, not walls.
Should I remove links between different topic sections?expand_more
No, not if they're relevant. A helpful cross-link between two topics routes authority where it's useful and helps readers. Only remove links that are genuinely irrelevant. Severing useful links for silo purity hurts both UX and authority flow.
Is a silo the same as a topic cluster?expand_more
They overlap. Both group content by topic. The difference is dogma: strict silos forbid cross-topic links, while clusters allow relevant ones and connect pillars. The cluster model keeps what works about siloing and drops the rigidity that doesn't.