Internal Linking for SEO: How to Build a Winning Strategy

Internal linking is one of the most underutilised SEO tactics available. It costs nothing, requires no third parties and has a direct impact on how search engines crawl your site, how PageRank flows through it and how users navigate between your content. A strategic internal linking structure is a significant ranking advantage.

How internal links impact SEO

Internal links serve three SEO functions. First, crawlability: Googlebot follows links to discover and re-crawl pages. Pages with no internal links (orphaned pages) are rarely crawled. Second, PageRank distribution: Google distributes authority through internal links. Linking from a high-authority page to an important page transfers ranking power. Third, topical relevance: internal links signal to Google which pages are related, reinforcing topical authority clusters.

Anchor text strategy

Use descriptive, keyword-rich anchor text that accurately describes the destination page. Avoid generic anchors like click here or read more - these pass no context to Google. Vary your anchor text naturally: use the exact target keyword in some links, partial match variants in others, and brand or title-based anchors occasionally. Never optimise every internal link with the same exact-match keyword anchor - this looks manipulative.

Building a hub-and-spoke structure

The most effective internal linking architecture is hub-and-spoke (also called pillar-cluster): a comprehensive pillar page on a broad topic links to multiple cluster pages covering specific subtopics, and each cluster page links back to the pillar. This concentrates PageRank on the pillar, signals topical expertise across the cluster, and creates a crawl-efficient structure Google rewards with stronger topical authority.

Fixing common internal link problems

Orphaned pages: pages with no incoming internal links. Find these in Ahrefs Site Explorer (filter for pages with zero internal links) and add them to relevant existing content. Broken internal links: crawl your site with Screaming Frog to identify 404 errors from internal links and fix or redirect them. Over-optimised anchor text: if more than 40% of your internal links to a page use the exact keyword as anchor, diversify the anchor text across those links.

Tools for internal link analysis

Screaming Frog (free to 500 URLs) maps your full internal link structure, identifying orphaned pages, broken links and pages with low inlink counts. Ahrefs Site Explorer shows which pages on your site have the most internal links and which have the fewest. Google Search Console Links report shows Google's view of your most-linked internal pages.