Internal Linking Architecture: The Underused Ranking Lever

Internal linking is one of the best-value technical SEO jobs, and one that many sites do poorly. Unlike link building (expensive, slow, largely outside your control), internal link structure is entirely within your hands, and costs nothing beyond the time to implement it. Yet on many sites the internal link structure is accidental - links added whenever someone remembered - or ignored completely.

PageRank Still Flows

Google still names PageRank in its guide to ranking systems: link analysis systems that use how pages link to each other to work out what pages are about and which might be most helpful. A useful mental model: every page has some authority from the links pointing to it, and internal links pass part of it on to other pages on the same domain.

The practical consequences of this model:

• Pages with no internal links (orphan pages) receive no equity from the rest of your site, regardless of how strong your domain is overall.
• Pages that receive many internal links from high-authority pages have a structural advantage, though links can’t make up for content that doesn’t answer the query.
• The homepage is typically the highest-authority page on a domain. Links from the homepage to category or pillar pages tell Google and visitors which pages matter most, so spend those links on your most important pages.
• Pages buried many clicks from the homepage are harder for visitors and crawlers to reach, and they usually receive fewer internal links.

The Silo Model vs. The Hub Model

Two internal linking architectures dominate in practice, and choosing the right one for your site type matters more than the specific implementation details.

The Silo Model works best for large e-commerce and transactional sites. Categories are strictly separated - a “running shoes” category page only links to running shoes, never to hiking boots. This prevents topical dilution and keeps equity concentrated within each vertical. The downside is rigidity: it requires disciplined content governance and doesn’t work well for sites with overlapping topic areas.

The Hub-and-Spoke Model (also called pillar-cluster) works better for content-heavy sites. A pillar page covers a broad topic comprehensively and links to a cluster of more specific articles. Each cluster article links back to the pillar, and to other relevant articles in the cluster. This model is more flexible and works naturally with most content management systems.

The mistake most sites make is applying neither - linking randomly, following no structure, and creating an internal link graph that looks like a tangled web when you visualise it rather than a deliberate hierarchy.

Anchor Text Strategy

Google’s link best practices say good anchor text is descriptive, reasonably concise and relevant to both pages, and that paying attention to internal anchor text helps both people and Google make sense of your site. Descriptive anchors are natural internally - just don’t cram keywords in, which Google counts as keyword stuffing.

• Use exact-match or close-variant anchors for pages you want to rank for specific terms. “Core Web Vitals optimisation guide” as anchor text for your CWV guide is a clear signal.
• Use natural variation for secondary links - you don’t need every internal link to the same page to use identical anchor text.
• Never use “click here”, “read more”, or “this article” as anchor text. They tell Google and screen-reader users nothing about the destination.
• Avoid over-optimising: if the same exact-match anchor appears 15 times on one page, that looks unnatural even internally.

Finding the Underlinked Pages

The most valuable internal linking work targets pages that have organic potential but poor internal link equity. The method: pull your crawl data, identify pages receiving 3 or fewer internal links, and cross-reference with keyword rankings data to find those sitting at positions 11-20.

Pages in positions 11-20 (page 2) are the most efficiently moved by internal links. They’ve already shown enough relevance for Google to rank them, so better internal links from relevant, strong pages on the same domain, with descriptive anchor text, are a sensible first step. Track them in Search Console over the following weeks to see whether they move.

Daylytix finds orphan and underlinked pages from the crawl in its internal linking suggestions, and proposes source pages and anchor text taken from the target page’s title and headings.

The Orphan Page Problem

Orphan pages - pages with zero internal links from the rest of the site - are more common than most site owners realise. They often end up this way because:

• Content was published and the author didn’t add related links at publish time
• Site restructures or menu changes removed the entry points without redirecting
• Pagination changes removed links to older content
• Tag or category pages were auto-generated and never linked from editorial content

Orphan pages may still be found through your sitemap, but they get no internal links to pass authority or context. Google’s link best practices are simple: every page you care about should have a link from at least one other page on your site. Link every page you want to rank into at least one relevant content cluster.

Practical Implementation

A structured approach to internal link improvement:

1. Content audit first: Map your existing pages into topic clusters before adding any links. You need the architecture before you add the connections.
2. Identify pillar pages: The 5-10 pages on your site that cover the broadest, highest-value topics. These should receive the most internal link equity from the rest of the site.
3. Prioritise position 11-20 pages: These are usually the best candidates for internal link work. Pages much further down typically need content improvements, not just links.
4. Add cluster links first, homepage links last: The temptation is to add everything to the homepage. Resist it. Contextual links within relevant content are higher-quality signals.
5. Measure: Track position changes for targeted pages over the following weeks. If pages aren’t moving, the anchor text or the authority of the source pages may need revisiting.