What is Internal Linking? Definition + Best Practices

Internal linking is the process of adding hyperlinks within your website's pages that point to other pages on the same domain. Done well, it transforms a collection of isolated pages into a structured system - one where each piece of content supports the rest; users can explore related topics naturally, and search engines have a clear map of what your site covers and which pages matter most.

Without a deliberate internal linking strategy, even strong content can underperform. Search engines may miss pages entirely, and visitors who land on a single post have little reason to explore further. Here, we'll break down exactly how internal linking works, what each type of link does, and the practical steps you can take to build a structure that improves both your rankings and your readers' experience.

Internal linking refers specifically to hyperlinks that connect one page on your website to other pages on the same domain. They act as roads that guide both users and search engines through your website’s content. Internal links can appear in any part of a page, including the main content, navigation menus, footers, sidebars, and breadcrumb trails.

It’s important to understand that each internal link has three core elements that define how it functions:

Together, these three elements define how pages on your website are connected and how information flows across your website. The way you structure your internal linking also influences how easily users and search engines can understand relationships between your content.

Internal linking is commonly used to point to related or important pages and create a logical structure across a website. Unlike external links, which lead users to other websites, internal links serve to keep users within your own site. This creates opportunities to offer additional useful pieces of content and answer follow-up questions without having users perform additional queries.

Internal links continue to play an important role when it comes to SEO. They help search engines find, understand, and rank your content. Without a clear internal structure, even pages that would otherwise perform well may struggle to gain visibility.

One of the main benefits is improved crawlability. When search engines are indexing pages, they look at links, and a well-connected site makes that process much easier. This also means that pages with no internal links pointing to them are harder to discover and may go unindexed.

When Googlebot visits your site, it follows links to discover and index pages. If a page has no internal links pointing to it (what's called an "orphan page") Googlebot may never find it at all, no matter how good the content is. A well-linked site essentially draws a map for crawlers, ensuring that every page gets a chance to be evaluated and ranked.

When discussing the importance of internal links for SEO, it’s also important to mention the distribution of authority. An internal link from a high-value page passes some of its strength along to the page it points to. This is particularly useful for elevating new or underperforming pages. This works through a concept called PageRank - the score Google assigns to each page based on the quantity and quality of links pointing to it. When you link internally from a strong page to a weaker one, you're redistributing some of that PageRank. Think of it like water flowing through pipes: the more connections a page has from authoritative sources on your site, the more PageRank flows into it, and the better its chances of ranking.

Another advantage is keyword relevance. The anchor text you use when adding internal links creates context about the target page that search engines can use when analyzing that specific page.

While the process of adding internal links is always the same, there are different types of internal links, each serving a different purpose when it comes to user experience and SEO:

Each of these types of internal links contributes to your website’s overall structure and user experience. A good internal linking strategy incorporates multiple link types that create different pathways for users and search engines to discover content on the website.

The most basic difference is directional: internal links keep users within your site, while external links send them elsewhere. But the more useful distinction is in what each type of link accomplishes for your SEO strategy.

Internal links distribute authority you already have. Every time a high-performing page on your site links to another page, it passes a share of its PageRank to that destination. This means your internal link structure directly controls which of your pages gets the most SEO support (it's entirely within your control).

External links, by contrast, bring link authority in from other domains. A link from a trusted, high-authority website signals to Google that your content is credible and worth ranking. This is why earning backlinks is such a significant part of most SEO strategies. Each one functions as a vote for your site from an outside source.

The two types of links work together rather than in competition. External links build your site's overall authority. Internal links determine where that authority flows once it arrives. A site with strong backlinks but poor internal linking may find that authority is pooling on just a few pages instead of supporting the full content library. Conversely, excellent internal linking on a site with few backlinks can only do so much - there's a ceiling without sufficient external signals.

One practical implication: when a high-authority external link points to one of your pages, that page becomes a strong source for internal linking. Linking from it to related but less visible pages is one of the most efficient ways to distribute earned authority across your site.

When creating your internal linking strategy, it’s smart to follow the practices that have proven effective and are in line with what search engines recommend:

Homepages typically have the highest authority, which makes them the strongest source for distributing ranking signals to other high-value pages. This also makes the website more intuitive and easy for visitors to find important pages quickly.

The rule of thumb is to limit internal links on your homepage to your most strategically important pages (e.g., key service pages, product categories, blog). It’s also important to organize them in logical categories based on user intent.

When including internal links in your pages, it’s smart to prioritize your high-value pages. These include pages targeting high-value keywords, covering core topics in your niche, and directly supporting business objectives (such as conversions).

Since search engines prioritize interlinked pages, you should ensure your high-priority pages both link to other pages and are linked to from other content on your website. For best results, make sure that each page that falls into this category receives multiple internal links from other pages.

You can use the anchor text in your internal links to signal to search engines what your target pages are about and which keywords you want them to rank for. Just remember not to stuff your content with those keywords without context.

Instead, you should come up with ways to find natural ways to incorporate them only when it makes sense. Additionally, ensure that the surrounding text supports the keyword and provides enough relevant context.

This doesn’t only help search engines better understand what your target pages focus on but also ensures users know exactly what page they’ll be taken to if they click on an internal link.

Just because your page is optimized for one main keyword, using it as anchor text helps signal this to search engines. But that doesn’t mean it should be the only anchor you use for it. In fact, it’s better to use varying anchor texts for the same page. This is also helpful when incorporating internal links into different pages on your site and gives you more natural entry points for linking to the same destination.

It’s also important to mention that not all anchor texts are the same. There are different types of anchors, and it’s a good idea to use more than one to point to the same target page:

According to Google, good anchor text is descriptive, concise, and relevant to both the source and target page.

Adding internal links too early in the text disrupts readability and can result in a visitor leaving the page before they’ve fully engaged with your content.

The best practice is to first establish context and explain the main idea, then add internal links where they feel more natural. This makes your posts easier to follow and ensures that links support the reader’s journey instead of interrupting it.

Including too many internal links in the same page dilutes their value and looks unintuitive for visitors. It also feels manipulative, which is why search engines prefer pages with an appropriate number of internal links.

The reason over-linking hurts comes down to how PageRank distribution works. Every page has a finite amount of authority to pass on. When you add more links to that page, the authority gets divided into smaller portions per link, so each individual link becomes less valuable. Additionally, Google allocates a limited crawl budget to each site. Overloading pages with links can waste that budget on low-priority destinations, leaving your most important pages crawled less frequently.

To ensure you don’t overdo it, stick to the following numbers when adding internal links:

These are practitioner guidelines, not figures from a single study. The right number of internal links for your site depends on content depth, page type, and how naturally links fit into the text. The most important rule is that every link should serve a clear purpose for the reader.

Sticking to a recommended number of internal links also ensures each anchor fits naturally within the surrounding text.

When building your internal linking structure, it’s important to understand the difference between dofollow and nofollow links. Dofollow links allow search engines to follow links and pass authority from the source page to the target page, while nofollow links instruct search engines not to pass authority to the target page..

For internal linking, dofollow links should be used by default. They help search engines discover your pages, better understand your site structure, and distribute value where it’s needed.

To ensure the entirety of your website is interconnected, you should regularly update old content with internal links. Create a schedule for reviewing the content you’ve previously published and identify opportunities to link from it to your newer pages.

When adding internal links to old pages, make sure that each of them creates meaningful connections across your website rather than arbitrary links. Think about whether it would make sense for the reader to follow that link at that specific point in the content and whether it would help answer a related question or expand on the topic. If the answer is yes, add an internal link. 

Over time, you may delete some pages or change URLs as your site evolves. This causes internal links you’ve already used to become broken links, which impact both the way search engines see your site and user experience.

To ensure broken internal links don’t have a negative effect on your site’s overall performance, you should make it a habit of going through your old pages and identifying any links that lead to non-existent pages. Remove or replace those links with new ones.

Before you can fix what's broken, you need to run an internal link audit to get a clear picture of your entire internal link structure. Run a site crawl using a tool like Screaming Frog, Ahrefs, or Semrush to generate a full internal link audit and surface any issues at once.

Internal linking is often talked about as being the most underutilized levers in SEO, even thought it’s one of the few you have complete control over. No waiting for backlinks, no outreach campaigns. Just a deliberate structure that helps search engines understand your site and gives readers a reason to stay.

Start with the fundamentals: connect your homepage to your most important pages, use descriptive anchor text, fix broken links, and revisit older content regularly. From there, build outward, ensuring every new piece of content you publish both links to and receives links from related pages.

Small, consistent improvements to your internal linking compound over time. A page that felt stuck can gain traction simply because you redirected authority toward it. Done right, internal linking will become the backbone of your SEO strategy.

If you'd like an expert eye on your current internal linking structure, the team at Heroic Rankings offers site audits that map exactly where authority is flowing on your site and where it's being left on the table. Get in touch to find out what your content is missing.

An internal link is a hyperlink on your website that points to another page on the same domain. These links appear in navigation menus, body content, footers, breadcrumbs, and other areas of a page, helping both users and search engines move through your site.

Internal links help search engines discover and index your pages, distribute authority (PageRank) from stronger pages to weaker ones, and provide keyword context through anchor text. Without them, valuable content can go unindexed or fail to rank.

Internal links connect pages within your own site and let you control how authority is distributed across your content. External links come from other websites and bring in new authority. The two work together — external links build your site's overall strength, and internal links decide where that strength flows.

It depends on the length and type of content. A general guideline is 3-7 links for standard pages (1,000-2,000 words), 5-10 for longer in-depth content, and 15-30 for homepages or category pages. The key is that every link should feel natural and serve a clear purpose for the reader.

Use descriptive anchor text that reflects the target page's main keyword, but vary it across your site. Mix exact-match, partial-match, long-tail, and branded anchors to keep links natural and give search engines a fuller picture of what the target page covers.