Internal linking is the cheapest SEO lever available. It requires no outreach, no budget and no new content, and most sites do it by accident — a few links added when someone remembers, with anchor text chosen in the moment.
What internal links do
Three things, each worth understanding separately.
They distribute authority. Pages with external links pass some of that value through internal links. A page that earned links can lift the pages it points to.
They establish relationships. Links and anchor text tell search engines which pages belong together and what each is about. This is how a collection of articles becomes a recognisable topic cluster.
They aid discovery. Pages linked from several places are found and recrawled sooner. Orphan pages may not be found at all.
The hub and spoke structure
The structure that works for content sites is straightforward. A hub page covers a broad topic comprehensively. Spoke pages cover specific subtopics in depth. The hub links to every spoke; every spoke links back to the hub and to two or three sibling spokes.
This concentrates authority on the hub, which is the page competing for the competitive head term, while giving each spoke a clear place in the structure. It also helps readers, which is the better reason to do it.
A practical hub covers five to fifteen spokes. Beyond that the hub becomes a link list rather than a page anyone reads, and the signal weakens.
Anchor text
Anchor text is the strongest on-page signal about what the linked page is about. Three rules.
Be descriptive. “Read more” and “click here” waste the signal entirely. The anchor should describe the destination.
Vary it. Using exactly the same phrase for every link to a page looks mechanical. Natural variation — the exact phrase, a close variant, a longer descriptive phrase — reads better and carries the same meaning.
Match intent, not just keywords. Link to the page that answers the question the reader has at that moment, with anchor text describing that answer. Internal links that interrupt a sentence to insert a keyword are noticed by readers and help nobody.
Where links should go
Contextual links within the body text carry the most weight and are the most useful to readers. Navigation links are necessary and carry comparatively little signal, because they appear on every page.
Footer link blocks stuffed with keywords are a pattern search engines have discounted for years. A short footer of genuinely important pages is fine; thirty links to every category is not.
Related-post modules are useful if the relationships are genuine. Automatically generated “related” sections based on loose tag matching add links without adding meaning.
Finding the opportunities
Three repeatable exercises.
Find orphan pages. Crawl the site, compare against the sitemap, and list pages with no internal links. These are usually old posts and landing pages. Every one of them should either get links or be removed.
Find pages with too few links. Sort all pages by inbound internal links. Pages you consider important with two or three links are an immediate opportunity.
Find relevant mentions. Search the site for a target page’s main phrase and look at every page that mentions it without linking. This is the single most productive internal linking exercise, and it takes about an hour per target page.
Prioritising which pages to strengthen
Not every page deserves internal links. Concentrate on three groups.
Pages ranking in positions five to twenty, where a modest lift produces a large traffic change. Pages with commercial value that are not ranking. And hub pages, which you want to be the strongest page on the site for their topic.
Avoid spreading links evenly. A site that links to everything from everywhere communicates no priority at all.
Common mistakes
Too many links on a page. A hundred links dilutes each one and makes the page unreadable. Keep body links purposeful.
Linking to noindexed or redirected pages. Wasted signal. Fix these during any audit.
Nofollowing internal links. There is no good reason to do this for pages you control and want indexed.
Links only in one direction. Hubs linking to spokes with no return path leaves the hub carrying all the authority and the spokes isolated.
Adding links and never revisiting. A link added two years ago may point at a page that has since been merged or removed.
Making it a process
Internal linking fails when it depends on someone remembering. Three mechanisms make it routine.
Add it to the publishing checklist: every new article links to at least three existing pages, and at least two existing pages are updated to link to it. The second half is the one that gets skipped.
Maintain a simple map of hubs and spokes, so writers know where a new piece fits before they start. This is also what prevents keyword cannibalisation.
Run a quarterly review: orphan pages, broken internal links, and new opportunities created by recent publishing.
Measuring it
Internal linking effects are gradual and best measured on the pages you targeted rather than site-wide. Track average position and impressions for those specific URLs before and after, over eight to twelve weeks.
Also track crawl frequency in server logs if you have them. Pages that gain internal links are typically crawled more often, which is the earliest visible signal that the change registered.
Internal linking for commercial pages
Content sites tend to link well between articles and badly to the pages that make money. The pattern worth adopting is deliberate rather than promotional.
Identify the commercial pages that correspond to each content cluster. From each article, link to the relevant commercial page once, at the point in the text where a reader would naturally want it — typically after the section that establishes the problem, not in a banner at the end.
Use anchor text that describes the destination honestly. A link reading “our pricing” to a pricing page is better than one reading “the best solution”, which readers discount and search engines treat as low quality.
The restraint matters. One well-placed link per article converts better than three, and keeps the content credible, which is what brought the reader there.
Links from the pages that have authority
Not all internal links are equal, and the difference is worth exploiting.
Find the pages on your site with the most external backlinks — usually a handful of older articles that happened to get picked up. These pages have authority that is currently flowing nowhere in particular.
Review each one and add two or three contextual links to pages you want to strengthen, where the link genuinely fits the text. This is a half-day exercise with a disproportionate effect, because you are redistributing authority you already earned rather than trying to earn more.
Repeat it whenever a page unexpectedly attracts links. A piece that goes unusually well is an asset to route, not just a traffic spike to enjoy.
Internal and external links together
Internal linking distributes authority; external links create it. The two are more effective planned together than separately.
The practical version: when a page earns external links, review what it points at internally and make sure that authority is being routed to pages that need it. And when planning link building outreach, target the pages that sit at the centre of a cluster, because a link to a hub lifts everything it links to rather than one page.
Frequently asked questions
How many internal links should a page have?
There is no fixed number. For a 1,500-word article, three to eight contextual links is typical. Add a link when it genuinely helps the reader, not to hit a count.
Do internal links from new pages help?
Yes, though less than links from pages that have authority of their own. A link from an established page that attracts external links is worth considerably more.
Should I link to the same page multiple times from one article?
Generally once, at the most relevant point. Additional links to the same destination add little and clutter the text.
Is a site-wide sidebar link valuable?
Much less than a contextual link. Links appearing on every page are discounted heavily, which is why a single relevant in-body link often outperforms a permanent sidebar placement.
