What Is Internal Linking and Why Does It Matter for SEO?
An internal link is any hyperlink that points from one page on your website to another page on the same website. While backlinks from external sites get most of the SEO attention, internal links are entirely within your control — and they do more for your rankings than most site owners realize.
Internal links serve two primary SEO functions:
- They distribute "link equity" (PageRank) — Authority flows from high-traffic pages to pages you link to from them, boosting those linked pages in search.
- They help search engines understand your site structure — Crawlers follow internal links to discover content and determine which pages are most important based on how many internal links point to them.
The Anatomy of an Effective Internal Link
Anchor Text
Anchor text — the clickable words of a link — signals to Google what the destination page is about. Use descriptive, keyword-relevant anchor text rather than generic phrases like "click here" or "read more." For example, instead of "learn more here," write "learn more about URL tracking best practices."
Link Placement
Links placed within the main body content of a page carry more weight than links in footers, sidebars, or navigation menus. Aim to include contextually relevant links within the natural flow of your article text.
Destination Page Relevance
Link to pages that are genuinely relevant to the content your reader is currently consuming. Irrelevant internal links confuse users and dilute the topical signals you're sending to search engines.
How to Build an Internal Linking Strategy
Step 1: Identify Your Pillar Pages
Pillar pages are your most important, comprehensive pages — the ones you most want to rank. These might be service pages, cornerstone guides, or high-value product pages. Everything else on your site should funnel link equity toward these pages.
Step 2: Map Your Topic Clusters
Group your content into topic clusters: a pillar page surrounded by supporting articles that link back to it. For example, a pillar page on "Link Management" might have supporting articles on UTM tracking, URL shorteners, and link rot — each linking back to the pillar.
Step 3: Audit Orphaned Pages
Orphaned pages have no internal links pointing to them. Search engines rarely discover or prioritize these pages. Use a crawl tool (Screaming Frog, Ahrefs Site Audit, or Google Search Console) to find orphaned pages and add relevant internal links to them.
Step 4: Link New Content from Existing Content
Every time you publish a new article, revisit 3–5 older related articles and add a link to the new page where relevant. This is one of the fastest ways to get new content indexed and accumulating authority.
Internal Linking Best Practices
| Do | Don't |
|---|---|
| Use descriptive, keyword-rich anchor text | Use generic phrases like "click here" |
| Link within body content | Rely only on navigation or footer links |
| Link to relevant, related content | Add links purely for SEO with no user value |
| Keep link depth shallow (3 clicks from home) | Let important pages be buried 6+ clicks deep |
| Audit internal links regularly | Set-and-forget after publishing |
How Many Internal Links Per Page?
There's no magic number, but a practical guideline is to include enough internal links to be genuinely helpful — typically 3 to 8 links per 1,000 words of content. Focus on quality and relevance over quantity. Stuffing a page with dozens of internal links will dilute the equity passed through each one and create a poor reading experience.
Internal linking is a high-ROI SEO activity because you control 100% of it. Even an hour spent improving your site's internal link structure can have a meaningful, lasting impact on your organic traffic.