Internal Linking for SEO: Structure, Anchors and Audits
Internal linking connects pages on your own site. Why it matters for SEO, how to build a hub and spoke structure, and how to audit the links you have.
Internal linking is linking from one page on your website to another page on the same website. Those links help Google find your pages, understand what each one is about, and work out which ones matter most.
It's the one part of link building you fully control. There's no outreach, no cost and no risk of a manual action, which is why it's so often the quickest win on a site that already has some backlinks.
Why do internal links matter for SEO?
Internal links do three jobs at once.
- Discovery. Google finds pages by following links. Its own link guidance says every page you care about should have a link from at least one other page on your site
- Authority flow. Links pass value between pages, so a page with strong backlinks can share some of that with the pages it links to. The guide to link juice explains how that flow works
- Context. The anchor text and the words around a link tell Google what the target page is about
They also help readers, which is the point. A visitor who lands on a guide and finds the next logical page one click away is more likely to stay.
Internal links vs external links
| Internal links | External backlinks | |
|---|---|---|
| Who controls them | You | Other site owners |
| Cost | Free | Time, money or both |
| Main SEO job | Discovery, context, spreading authority | Bringing new authority into the site |
| Anchor text risk | Low, descriptive anchors are recommended | Higher, exact-match anchors can look manipulative |
| Speed of effect | As soon as Google recrawls | Depends on the linking site |
Backlinks bring authority into your site. Internal links decide where it goes once it's there. You need both, and the link building guide covers the external side.
The hub and spoke structure
The simplest structure that works is hub and spoke, sometimes called topic clusters. A hub page covers a broad topic and links to every detailed page on it. Each detailed page (a spoke) links back to the hub and across to closely related spokes.
This site is built the same way. The link building strategies hub links to every tactic, and each tactic page links back up and across to its nearest neighbours.
For online shops the hubs are usually category pages, and the ecommerce link building guide covers how to push authority from blog content into them.
Anchor text for internal links
Google's link guidance recommends descriptive anchor text that makes sense on its own, and warns against generic anchors like "click here" and against keyword stuffing.
Internal anchors can be much more descriptive than external ones. Linking to your pricing page with "link building pricing" is normal and expected, whereas the same exact-match anchor on dozens of external sites starts to look built. The anchor text guide covers the external side in detail.
A few practical habits:
- Describe the target page, not the current one
- Vary the wording naturally across pages rather than repeating one phrase everywhere
- Link from inside the body copy where it helps the reader, not just in menus and footers
- Use normal
<a href>links, since Google says it can only crawl links that are<a>elements with anhrefattribute
How to audit your internal links
- Crawl the site with a tool such as Screaming Frog (free up to 500 URLs) or a site audit tool from your link building tool stack
- Find orphan pages. Pages with no internal links pointing at them are hard for Google and readers to find
- Check click depth. Important pages buried four or five clicks from the homepage usually deserve a shorter path
- Fix broken internal links and redirect chains so links point straight at the live URL
- List your priority pages and make sure each gets links from relevant, well-linked pages
- Use your backlink data. Pages with the most external links are your best sources of internal links, which a backlink audit will surface
How many internal links should a page have?
Google doesn't publish a number. The useful test is whether each link helps a reader who's on that page.
As a rule of thumb, a 1,500-word article might carry somewhere between 5 and 15 contextual links to related pages, plus the site navigation. Fewer is fine on a focused page, and far more starts to dilute attention for readers. Treat that range as a sense check, not a target.
Common internal linking mistakes
| Mistake | Why it hurts | Fix |
|---|---|---|
| Orphan pages | Hard to discover, receive no internal authority | Link to them from the relevant hub and related pages |
| Everything linked from the footer | Little context, every page looks equally important | Link contextually from body copy |
| Generic anchors ("read more") | Gives Google no clue about the target | Use descriptive anchors |
| Linking to redirected URLs | Wastes crawl and adds a hop | Update links to the final URL |
| Money pages linked only from the menu | Misses the context of in-content links | Link to them from relevant guides |
| JavaScript-only links | Google may not be able to crawl them | Use <a href> links |
The short version
- Internal links help Google discover pages, pass authority around your site and understand what each page is about
- A hub and spoke structure keeps every page close to the homepage and close to its related pages
- Descriptive internal anchors are recommended by Google, so be generous with them
- Audit for orphan pages, deep pages and broken links, then link to priority pages from your strongest ones
- There's no official number of internal links per page, link where it helps the reader
Backlinks get authority into your site. Internal links make sure it reaches the pages you actually want to rank.