What Is Internal Linking?

Internal linking covers every hyperlink that leads from one page to another within the same domain: a link in the main menu, a link in the footer, a "related articles" block at the end of a post, or a single link placed inside a paragraph. Any hyperlink that keeps the visitor on the same domain counts as internal. It differs from external linking, meaning backlinks, in that no other domain is involved, so a site doesn't depend on a third party choosing to link to it.

Every time a crawler visits a page, it follows the links it finds to discover new pages. Without a deliberate internal linking setup, entire sections of a site stay outside that path, no matter how strong the content is. That holds true even on a site with thousands of pages and a clean XML sitemap, because a sitemap only lists which pages exist, it doesn't replace the relevance signal a real link from related content provides.

Internal linking doesn't replace a solid technical SEO architecture, it builds on it: architecture decides which pages exist and how they group into categories or directories, and internal linking connects them in practice, day by day, every time new content goes live.

Contextual links inside body text usually carry more weight than pure navigation links, because they sit surrounded by related content, giving Google a clearer relevance signal.

When a crawler follows an internal link, it doesn't just discover the destination page: it also passes on part of the linking value from the source page, a concept that follows the logic of PageRank. A page with many quality internal links pointing to it tends to build up more value than an isolated one, and that value splits across every outgoing link on a page: the more links a page sends out, the less value each individual destination receives.

The visible, clickable link text, the anchor text, matters as much as the link itself. A descriptive anchor such as "internal linking guide" tells Google and the reader what the target page covers; a generic phrase like "click here" adds nothing, since it doesn't describe the destination. Reusing the exact same anchor text toward the same target across dozens of pages stops adding value past a certain point too, so it's worth varying the wording while keeping the meaning intact.

Internal links are dofollow by default: they pass link value without restriction, which is usually the behavior a site wants for its own pages. Marking an internal link nofollow is uncommon and only makes sense in specific cases, such as links to login pages, a shopping cart, or administrative sections that shouldn't be crawled or accumulate link value.

Solid internal linking lowers click depth: the fewer clicks it takes to reach a page from the homepage, the easier it is for the crawler to find and revisit it regularly. Pages buried six or seven clicks from the homepage get less crawling attention, even with strong content, and usually take longer to get indexed after publishing.

It also helps Google understand how pages relate to each other topically. Grouping related articles around a central page, the approach behind a pillar page, reinforces that topical signal and keeps visitors browsing the site instead of returning to search.

The effect on the visitor is just as direct: someone who lands on an article from a search result and finds links to related content has more reason to stay on the site, keep reading, and, on a store or a services site, move a step closer to converting without leaving the domain.

• Link every page that matters from at least one other page, so no valuable content sits isolated.
• Use descriptive, varied anchor text instead of repeating the same exact phrase toward the same target.
• Favor contextual links inside content over links placed only in the menu or footer.
• Check regularly for internal links that resolve to a 404 error.
• Keep internal links dofollow unless there's a specific reason not to.
• Structure content around central pages that group and link related articles on the same topic.

• Leaving orphan pages with no internal link pointing to them, which makes them hard for the crawler to find.
• Overloading a page with dozens of internal links, which dilutes the value each one passes on.
• Reusing the same generic anchor text, like "learn more" or "here", instead of descriptive wording.
• Leaving internal links pointing at URLs that no longer exist and return a 404 error.
• Linking only from the navigation menu and skipping contextual links inside the content.