Internal Linking
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Internal linking is the practice of linking from one page on your site to another. It is one of the few SEO levers entirely within your control, and one of the most consistently underused. Done well, internal linking distributes authority where you want it, makes content discoverable, and reinforces the topical structure of your site.
What internal links do
Distribute PageRank across the site. Every page accumulates authority through external links. Internal links pass a portion of that authority to the pages they target. A page with no internal links accumulates authority less efficiently and often fails to rank, no matter how good the content is.
Signal topical relationships. When pages cluster around a topic and link to each other, search engines recognise the cluster as a coherent body of work. That recognition contributes to the site’s perceived authority on the topic.
Help crawlers discover content. Pages that are not linked from anywhere are functionally orphaned. Search engines may eventually find them via sitemaps, but discovery is slower and crawl frequency is lower than for well-linked pages.
Guide users through your content. Internal links shape how readers move through a site. A reader who arrives on a cluster page and follows three internal links has engaged with four pages, all of which contribute to engagement signals.
The pillar-and-cluster model
The dominant internal linking architecture for content sites is the pillar-and-cluster model. A pillar page is a comprehensive overview of a topic; cluster pages treat specific aspects of that topic in depth. The pillar links to every cluster, every cluster links back to the pillar, and clusters within the same pillar link to each other where contextually relevant.
This structure:
- Establishes the pillar as the canonical resource on the topic
- Allows each cluster to rank for its specific sub-topic
- Distributes authority through the cluster, with the pillar accumulating the most
- Signals to search engines that the site covers the topic comprehensively
Anchor text in internal links
Anchor text on internal links sends a relevance signal in the same way external anchor text does. The patterns:
Use descriptive anchor text. “Learn more about Core Web Vitals” is better than “click here”. The former tells the reader and the search engine what the linked page covers; the latter conveys nothing.
Vary anchor text naturally. A page receiving 50 internal links with the exact same anchor text looks templated. Vary the wording while keeping the underlying meaning consistent.
Don’t over-optimise. Internal anchor text is less likely to trigger penalties than external anchor text, but exact-match keyword anchors used in volume across a site still look unnatural. Mix exact-match, partial-match, and natural phrase anchors.
Avoid generic anchors. “Read more”, “click here”, “this page”, “more info” provide no signal. They’re occasionally appropriate (within a CTA button, for instance) but should never be your default.
Strategic internal linking
The internal links worth adding or strengthening first:
From your highest-authority pages to your priority targets. Identify the pages on your site with the most external links (Ahrefs, ahrefs.com/site-explorer; Search Console, top-linked pages). Add contextual internal links from those pages to the pages you most want to rank.
From new content to established cornerstone pages. When publishing new content, link back to the cornerstone pages on related topics. This reinforces the cornerstone’s authority and helps the new content inherit topical context.
From related cluster pages to each other. Within a topical cluster, sibling pages should link to each other where the connection is genuinely useful for readers. This builds internal authority across the cluster.
From transactional pages to supporting informational content. Product pages and service pages often have weaker internal link profiles than informational content. Linking from related blog posts and guides to the relevant product or service page is one of the most consistent ways to lift commercial page rankings.
Common internal linking mistakes
| Mistake | Why it matters |
|---|---|
| Orphan pages (no inbound internal links) | Discoverability and authority loss |
| Over-linking from the homepage | Dilutes equity across too many targets |
| Using only navigation links, no contextual links | Misses the most powerful link type |
| Linking to the same page repeatedly with identical anchor text | Looks templated; less effective than varied anchors |
| No internal links to commercial pages | Commercial pages underperform their potential |
Auditing internal links
Tools that surface internal linking data:
- Google Search Console > Links > Internal links: top linked pages and most common internal anchor text
- Screaming Frog: crawl-based view of internal link counts per URL, anchor text distribution, and orphan pages
- Ahrefs Site Audit > Links > Internal: similar to Screaming Frog with additional context
A useful starting audit: which pages have the most external link equity, and which of your priority commercial or cluster pages have the fewest internal links pointing at them? Closing that gap is often the highest-impact internal linking work available.
Frequently asked questions
How many internal links should a page have? There’s no fixed number. As many as are genuinely useful for the reader. Pages with 50+ contextual internal links are not unusual on long-form content; pages with fewer than five often signal an under-developed information architecture.
Do nofollow internal links pass any value? No. Internal nofollow links should be avoided in nearly all cases. The original use case (sculpting PageRank) hasn’t worked since 2009.
Should internal links open in new tabs? No. New-tab behaviour is appropriate for outbound links to third-party sites, not internal navigation. Forcing new tabs for internal links breaks browser back behaviour and frustrates users.