Internal Linking

Hyperlinks that connect one page on a website to another page on the same domain, distributing authority and aiding crawling.

Definition

Internal linking is the practice of placing hyperlinks within page content that point to other pages on the same website. Unlike external links (backlinks) which come from other domains, internal links are fully under your control and serve several critical SEO and UX functions: they help Googlebot discover new and updated pages, they distribute PageRank (link equity) throughout the site, and they signal topical relationships between pages.

A well-designed internal link structure forms a topical cluster model: a comprehensive pillar page (e.g., "Complete Guide to SEO") links to and receives links from cluster pages (e.g., "Keyword Research," "On-Page SEO," "Technical SEO"). This architecture concentrates authority on the pillar page while signalling topical depth to search engines.

Key practices: use descriptive, keyword-rich anchor text that accurately reflects the destination page's content; ensure important pages are reachable within three clicks from the homepage; avoid orphan pages (pages with no internal links pointing to them); and periodically audit your internal link structure using a link analysis tool to identify broken links or pages with low internal link equity.

Frequently Asked Questions

How many internal links should a page have?

There's no fixed limit. Google has said it can crawl thousands of links on a page, but from a UX and equity-distribution perspective, keeping it to genuinely useful links (10–100 per page depending on content length) is recommended. Avoid link-stuffing just to increase counts.

Does internal linking really pass PageRank?

Yes. Google's original PageRank algorithm distributes link equity through both external and internal links. Each internal link passes a fraction of the source page's authority to the destination. Strategic internal linking can significantly boost the ranking potential of key pages.