Internal Linking Best Practices For On Page SEO | Lillian Purge

Internal Linking Best Practices For On Page SEO

Internal linking is one of the most misunderstood parts of on page SEO, and in my opinion, one of the highest leverage areas most websites underuse. I see businesses obsess over backlinks, content volume, and tools, while their internal linking quietly undermines everything they are trying to achieve.

When internal linking is done properly, it amplifies the impact of content, clarifies site structure, improves crawl efficiency, and helps the right pages rank for the right queries. When it is done badly, or not done at all, even excellent content can struggle to perform.

This article explains internal linking best practices for on page SEO, not as a checklist, but as a system. I will cover what internal linking is actually for, where most sites go wrong, and how to think about links in a way that supports rankings, usability, and long term growth. Everything here is based on real audits and outcomes, not theory.

What Internal Linking Really Does In SEO Terms

At its core, internal linking does three things.

It helps search engines discover pages.

It helps search engines understand relationships between pages.

It helps distribute authority and importance across the site.

Most people understand the first point. Fewer understand the second. Almost nobody properly accounts for the third.

In my opinion, internal links are not just navigation aids. They are signals. Every internal link tells search engines, “this page matters, and it is related to this topic”.

If those signals are inconsistent or weak, on page SEO suffers no matter how good the content is.

Why Internal Linking Is An On Page SEO Issue

Internal linking is often treated as a technical SEO or architecture topic, but it is deeply tied to on page SEO.

On page SEO is about relevance and clarity. Internal links reinforce both.

When you link from a page about a topic to another page about a closely related subtopic, you are strengthening topical signals. You are also helping users move naturally through information.

From experience, internal linking often makes the difference between pages that rank on page two and pages that move into the top positions.

The Most Common Internal Linking Mistake, Leaving It To Chance

The biggest mistake I see is randomness.

Links are added when someone remembers, or when a CMS auto suggests them, or when a writer happens to think of another page. There is no plan, no hierarchy, and no consistency.

In my opinion, internal linking should be intentional. You should know which pages are most important, which pages support them, and how authority should flow.

Without that clarity, internal links become noise rather than signals.

Start With Clear Page Priorities

Before you add or optimise a single internal link, you need to know which pages matter most.

Every site has pages that drive revenue, leads, or core business outcomes. These pages should sit at the centre of your internal linking strategy.

From experience, many sites treat all pages equally, which means none of them are properly supported.

In my opinion, internal linking best practice starts with prioritisation. Decide which pages you want to rank and convert, then build links around them deliberately.

Use Contextual Links, Not Just Navigation Links

Navigation links are useful, but they are not enough.

Search engines understand menus, footers, and sidebars, but they place more weight on contextual links within the main body of content.

A link embedded naturally in a paragraph, surrounded by relevant text, carries far more contextual value than a generic menu link.

From experience, sites that rely solely on navigation links often underperform compared to sites that actively use contextual internal linking within content.

If you want on page SEO gains, contextual links are essential.

Anchor Text Should Be Natural But Descriptive

Anchor text is one of the clearest on page signals internal linking provides.

The mistake I often see is either extreme. On one side, over optimisation with exact match anchors everywhere. On the other, vague anchors like “click here” or “read more” that add no meaning.

In my opinion, the best practice is descriptive but natural anchor text.

The link text should make sense to a user reading the sentence, and it should give search engines a clear idea of what the linked page is about.

Variety matters too. Using slightly different phrasing across links looks natural and helps reinforce relevance without repetition.

Link From Strong Pages To Important Pages

Not all pages carry the same weight.

Pages that already receive traffic, links, or engagement tend to have more authority to pass internally. Linking from these pages to priority pages is one of the most effective internal linking tactics available.

From experience, this is often overlooked. New pages are published, but they are not linked from strong existing content, so they struggle to gain traction.

In my opinion, every new important page should be supported by links from relevant, established pages wherever possible.

Avoid Orphan Pages At All Costs

An orphan page is a page with no internal links pointing to it.

From an SEO perspective, orphan pages are almost invisible. They may still be indexed, but they carry little weight and are crawled infrequently.

From experience, orphan pages are extremely common, especially on content heavy sites.

Internal linking best practice means ensuring that every indexable page is reachable through internal links, ideally from multiple relevant pages.

If a page is not important enough to link to, it is often not important enough to exist.

Build Topic Clusters With Internal Links

One of the most effective ways to use internal linking for on page SEO is through topic clustering.

This means creating a central page that covers a core topic, supported by multiple related pages that explore subtopics in more depth. Internal links connect these pages in a logical, two way structure.

The supporting pages link up to the main page, reinforcing its authority. The main page links out to the supporting pages, reinforcing relevance.

From experience, this structure helps search engines understand topical depth and improves performance across the entire cluster.

Structured linking achieves this where random blogging does not.

Link Horizontally As Well As Vertically

Most people think of internal linking vertically, from blog posts to service pages, or from subpages to main pages. Horizontal linking is often overlooked.

If two pages cover related aspects of the same topic, linking them together helps search engines understand their relationship and helps users explore naturally.

From experience, horizontal links improve engagement and reduce bounce rates, which indirectly supports SEO performance.

Internal linking best practice is not just about hierarchy. It is about relationships.

Do Not Over Link Or Under Link

There is no perfect number of internal links per page, but extremes are usually a problem.

Pages with dozens of internal links in every paragraph dilute focus. Pages with one or two links often miss opportunities.

In my opinion, links should feel helpful, not forced.

From experience, most pages benefit from several relevant internal links placed where they genuinely add value to the reader.

If internal links feel distracting or spammy, they probably are.

Keep Internal Links Crawlable And Simple

Internal links only work if search engines can follow them.

Links hidden behind scripts, triggered only by user interaction, or injected dynamically in ways crawlers struggle with may not pass value consistently.

From experience, plain HTML links are still the most reliable.

In my opinion, important internal links should never depend on JavaScript execution or complex interactions to be discovered. Simplicity supports consistency.

Use Internal Links To Reinforce Page Purpose

Internal links should support the purpose of the page, not undermine it.

For example, a commercial page should not link out excessively to informational content in a way that distracts from conversion. Informational pages should guide users toward relevant next steps.

From experience, many pages fail to convert because internal linking sends users in too many directions without intent.

Internal linking best practice includes guiding users logically through the site, not just connecting pages at random.

Regularly Audit Internal Linking

Internal linking is not a set and forget activity.

As sites grow, links become outdated, priorities change, and new opportunities appear.

From experience, regular internal linking audits uncover quick wins: strong pages with few outbound internal links, important pages with weak internal support, or old content that could pass authority but does not.

In my opinion, reviewing internal linking should be part of ongoing on page optimisation, not a one off task.

Be Careful With Footer And Sidebar Links

Footer and sidebar links can be useful, but they should not be abused.

Linking to every service, every location, and every blog post in the footer can dilute signals and overwhelm crawlers.

From experience, footers work best when they reinforce core sections, not act as dumping grounds.

Internal linking best practice favours relevance over volume.

Internal Linking And User Experience Go Together

One of the most important things to remember is that internal linking is for users first.

Search engines are trying to model user behaviour. Links that make sense to users tend to perform better long term.

From experience, internal links that genuinely help users find related information lead to longer sessions, more engagement, and better outcomes.

If you would not expect a real user to click a link, question why it exists.

Common Internal Linking Mistakes To Avoid

In practice, there are a few mistakes I see repeatedly.

Using the same anchor text everywhere without variation

Linking only from blogs and never from core pages

Creating long chains of links that lead nowhere useful

Ignoring internal links when publishing new content

Over linking to low value pages while under linking to important ones

In my opinion, these mistakes usually stem from lack of planning rather than lack of effort.

Internal Linking As A Competitive Advantage

Internal linking is one of the few SEO levers fully under your control.

You do not need permission. You do not need outreach. You do not need budgets. You just need understanding and discipline.

From experience, sites that get internal linking right often outperform competitors with more content and more backlinks.

It is not flashy, but it is powerful.

A Forward Thinking View On Internal Linking

Looking ahead, internal linking will matter even more.

As search engines rely more on understanding topics, relationships, and context, internal links help define that structure clearly. AI driven systems still depend on site signals to understand what matters and how pages relate.

Sites with clear, intentional internal linking will be easier to interpret, trust, and surface.

My Final Thoughts

In my opinion, internal linking is one of the most underused best practices in on page SEO.

It is not complicated, but it does require thought. It requires knowing what matters, guiding both users and search engines, and maintaining structure as the site grows.

If you want better rankings, better crawling, and better use of the content you already have, internal linking is often the fastest place to start.

Treat it as a system, not an afterthought, and it will quietly do a lot of heavy lifting for your SEO.