Why Internal Linking Is So Important
Internal links are links from one page of your website to another page on the same website. They serve three crucial functions: they help Google discover and crawl your pages. They distribute "link authority" from strong pages to weaker ones. And they show Google the topical relationship between your content.
Unlike backlinks (external links from other websites), you have full control over internal links. You can set, change, and optimize them at any time — without depending on others. This makes them the most efficient SEO lever you have.
Internal links are the SEO factor you can control most easily. They help Google with crawling, distribute authority, and strengthen your topic clusters.
How Google Uses Internal Links
Google's crawler discovers new pages by following links. If one of your pages isn't linked from another page, it's an "orphan page" — and Google may never find it (or only very late via the sitemap). Every important page should be linked from at least 2–3 other pages.
Furthermore, Google uses the anchor text of internal links (the clickable text) to understand what the linked page is about. If you link from one article to another with the anchor text "optimize Core Web Vitals," Google understands: the target page covers the topic of Core Web Vitals.
The Pillar-Cluster Strategy
The most effective method for internal linking is the pillar-cluster structure. The pillar article (e.g., "What is AI Optimization?") links to all cluster articles. Each cluster article links back to the pillar and to 2–3 related cluster articles. This creates a network that signals topical coherence to Google.
Rules for Good Internal Links
Use descriptive anchor texts. Instead of "click here" or "learn more," use the actual topic text: "Learn how to implement Schema Markup." This gives Google and the reader context.
Link from within the body text. Links in regular text carry more weight than links in the navigation, footer, or sidebars. When a topic comes up naturally in the text, set a link.
Don't over-optimize. Only set links that are useful for the reader. If every other sentence contains an internal link, readability suffers — and Google detects manipulation.
Regularly check for orphan pages. Every page in your sitemap should be linked from at least one other page. New articles should be immediately linked into existing articles.
Practical Checklist
After every new article: Go through 3–5 existing articles and add a link to the new article where it fits topically. Add 3–5 links to existing articles in the new article.
Once a month: Check that all pages receive at least 2 internal links. Identify your strongest pages (most impressions in Search Console) and link from there to pages you want to boost.
Sources
- Google Search Central: Official documentation on search engine optimization best practices. developers.google.com
FAQ
Internal links are links from one page of your website to another page on the same website. They help Google with crawling, distribute authority, and show topical relationships.
There's no fixed number. As a guideline: 3–5 internal links per 1,500 words is a good starting point. More important than the number is relevance — every link should be useful for the reader.
Yes. Google uses the anchor text of internal links to understand what the linked page is about. Descriptive anchor texts like 'optimize Core Web Vitals' are better than generic ones like 'click here.'
Last updated: March 25, 2026