How do internal links help SEO?

Internal links do three jobs: they help search engines discover your pages, they communicate your site structure and which pages are most important, and they pass ranking authority (PageRank) from one page to another. Pointing internal links at a page is a direct lever on its ranking potential.

How many internal links should a page have?

There's no fixed number — link wherever it's genuinely relevant to the reader. Important pages should receive more internal links than minor ones, and every page should have at least a few contextual links pointing to it so it isn't orphaned.

What is the best anchor text for internal links?

Use descriptive, relevant anchor text that reflects the target page's topic — it helps search engines understand what the linked page is about. Avoid generic anchors like "click here" and avoid over-optimising every link with the exact same keyword.

Internal Linking in SEO — How It Works (With Examples)

If you only change one structural thing on your site, change your internal linking. It’s the lever you fully control — no outreach, no waiting on other sites — and it directly decides how ranking authority moves through your pages.

What internal linking is

An internal link is any link from one page on your domain to another page on the same domain. Your navigation, your breadcrumb trail, and the contextual links inside your content are all internal links. Together they form your site’s link graph — the map search engines follow to crawl, understand, and rank your site.

The three jobs internal links do

Discovery. Search engines find new pages by following links. A page that’s linked gets crawled; a page that isn’t becomes an orphan.
Structure and priority. The pattern of internal links tells search engines which pages are most important. Pages that receive many internal links read as high-priority; pages that receive few read as minor.
Authority flow. Internal links pass PageRank. When a strong page links to another page, it shares some of its ranking power. This is how you route authority deliberately to the pages you want to rank.

A practical example

Say you run a coffee site with a high-authority guide, “How to brew pour-over coffee,” that earns backlinks and ranks well. You also have a product page for a pour-over kit that’s stuck on page two.

Before: the guide doesn’t link to the product page. The product page sits at depth 4, reachable only through the shop menu, with two internal links.
After: you add a contextual link from the popular guide — “the [pour-over kit] we recommend” — plus links from three related brewing articles.

Now the product page receives authority from your strongest page, its crawl depth drops, and search engines see a cluster of related pages all pointing to it. That’s internal linking doing real ranking work — no new content required.

Internal linking best practices

Link from strong pages to target pages. Identify your highest-authority pages and make sure they link to the pages you want to rank.
Use descriptive anchor text. Reflect the target page’s topic; skip “click here.”
Build topic clusters. A pillar page and its supporting articles should link to each other, concentrating authority around the topic.
Don’t orphan anything. Every important page should have multiple contextual internal links pointing to it.
Link where it helps the reader. Relevance first — links that serve the user are the ones search engines reward.

Where internal linking fits

Internal linking is one pillar of site architecture, alongside crawl depth and topical structure. Done well, it routes your existing authority to the pages that need it most.

Mapping where your authority currently pools and leaks — and which exact links to add — is what a site architecture audit delivers: your internal link graph modelled, with a prioritised list of the links that will move rankings.