Internal Linking — Definition & Meaning
What is Internal Linking?
Internal linking is the practice of linking from one page on your site to another. It distributes ranking authority across your domain, helps crawlers discover new content, defines topical relationships, and signals to Google which pages are most important — all of it fully under your control.
Internal link types
| Link type | Typical location | Purpose | SEO effect |
|---|---|---|---|
| Navigational | Header / nav menu | Site-wide wayfinding to core pages | Distributes authority evenly; signals top-level page hierarchy |
| Contextual | Inline within body copy | Points to a specific, topically related page | Strongest relevance signal; anchor text is fully under your control |
| Footer | Site footer | Legal/utility links (pricing, terms, sitemap) | Weak topical signal; helps crawl discovery more than ranking |
| Breadcrumb | Below header on interior pages | Shows the path back to the parent/category page | Reinforces site hierarchy and shortens crawl depth to that page |
Contextual links carry the most ranking weight; the other three exist mainly for crawlability and navigation.
Key points
- Every new page needs at least 3 contextual internal links from existing indexed pages within days of publishing — otherwise it may sit in "discovered, not indexed" limbo.
- Prioritise linking from your highest-authority pages to your money pages — authority flows through internal links, not just external.
- Anchor text on internal links is 100% under your control — use varied, semantically related phrases that match target-page intent.
- Topic clusters (pillar + spokes) are the modern internal-linking architecture — pillar page interlinks to every cluster page, and each spoke links back to the pillar.
- Broken internal links waste crawl budget and leak authority — audit quarterly with a crawler like Screaming Frog or Ahrefs Site Audit.
Example
A new "how to use IndexNow" article gets 4 internal links added within an hour — from the sitemap guide, the indexation-audit guide, the crawl-budget guide, and the technical-SEO hub. Result: indexed by Google in 6 hours instead of 6 days.
Frequently asked questions
How many internal links should a page have?
No strict limit — 30-100 total is common for content pages. Focus on relevance over count. Google's John Mueller has said "we handle thousands per page fine".
Do internal nofollow links pass authority?
No — internal nofollow prevents PageRank flow. Rarely useful; almost never worth using internally.
What is a topic cluster?
A pillar page targeting a broad head term + multiple spoke pages targeting long-tail sub-topics, all interlinked. Google's NLP treats the cluster as coherent topical authority.