Internal links are one of the most overlooked levers in SEO, largely because you have complete control over them. Unlike backlinks, you don’t need to convince anyone else to add them. This guide covers what internal links are, why they matter, and how to build and audit a strong internal linking strategy.
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What is an internal link?
Simply put, an internal link is one that leads from one page to another within the same website. External links, by contrast, lead from a page on your site to a page on a different website.
Why are internal links important for SEO?
There are several reasons why internal links are of fundamental importance in SEO.
First, we have to consider that these links increase the pages’ authority, since they indicate to Google which are the most important pages of a site. The mechanism behind this is called PageRank, or link equity. When Page A links to Page B, some of Page A’s authority passes to Page B. A page that already has a lot of external backlinks can strengthen other pages on your site simply by linking to them.
Also, internal links increase the time users spend on a site, as they move from one page to another on the same website.
Another reason why internal links are essential is that they make the site’s structure easy to follow. This also helps search engines find and index the web pages without any problem.
When Google understands your site’s structure well through consistent internal linking, it can sometimes generate sitelinks, the extra indented links you’ll occasionally see underneath a brand’s top search result.
Types of internal links
Not all internal links do the same job, and knowing the difference helps you decide where to actually place one.
Structural links are the ones that stay consistent across your whole site: your main navigation, footer, and sidebar. They’re essential for usability, but because they appear on every page, Google treats them as less specific context than links placed inside your actual content.
Contextual links are the ones placed within the body of a page, next to text that’s actually about the topic you’re linking to. These carry more weight for SEO, since both the surrounding text and the anchor text itself give Google real context about the linked page.
A healthy site uses both. Structural links keep your site navigable, contextual links do most of the heavy lifting for relevance and authority.
Best practices for internal linking
Now that we’re clear on why internal links are crucial in SEO, let’s look at the guidelines. Here are the best practices to build internal links:
Check that all your pages are linked
Search engines don’t only rely on sitemaps to discover web pages, they also follow internal links. Make sure you don’t have orphan pages, which are pages not linked to from any section of your site.
An orphan page can sometimes still get indexed, for example through your sitemap or a link from another website, but it misses out on the internal link signal entirely, and it’s much harder for search engines and users to find. The easiest way to detect orphan pages is by crawling your site with an SEO tool like FandangoSEO.
Create a structure on your site that is not too complex
Ideally, each page of a website should be reachable by a maximum of three clicks from the home page. A simple website structure with a small number of depth levels allows users to find the page they want in a few clicks, which also means a better user experience.
You should consider that users nowadays expect websites to be fast, including when it comes to loading a page and completing an action on it.
Include a logical number of links on each page
The more links a page contains, even external ones, the less link equity each one will pass to the page it points to. On top of that, it can be strange and unpleasant for a reader to find a wall of links in a piece of text.
A page packed with links may also raise suspicions. Search engines may interpret it as spam, and if that happens, the page’s authority can take a real hit.
So, a good practice is to keep a reasonable number of links per page, so the pages you link to can gain meaningful authority rather than a diluted trickle.
Link from your strongest pages to pages that need a boost
Some of your pages already carry more authority than others, usually because they’ve earned backlinks from other sites. You can use that authority deliberately by linking from those stronger pages to pages that need help ranking.
Start by identifying your most-linked or best-performing pages using an SEO tool, then look for natural, relevant places within them to add a link to the page you want to strengthen. This turns internal linking from something reactive into something you can actually plan around.
Use keywords in the anchor text
Including keywords in the anchor text allows you to improve the ranking of these keywords, since internal links act somewhat like backlinks. That said, keep anchor text brief and descriptive rather than repeating the exact same phrase on every link, and avoid vague text like “click here,” which gives search engines and users no context at all about where the link leads.
Add internal links to new content right away
Every time you publish something new, look for existing pages that could reasonably link to it. A quick way to find candidates is to search Google with site:yourdomain.com [topic], which surfaces pages on your own site already talking about that subject.
As a rule of thumb, aim for at least two or three internal links pointing to any new page shortly after it goes live. New pages don’t have any internal authority yet, so this is what gives them their first real signal.
Perform an internal link audit
Remember that you’re wasting your crawl budget every time the crawler encounters an SEO issue such as a broken page, a server error, or an unnecessary redirect on your site.
That’s why it’s so important to audit your internal links regularly. Using Google Search Console, you can get a general idea of whether you have a structural problem, but for a deep analysis, it’s worth using an SEO Crawler that maps your website’s internal linking structure and flags issues automatically. A proper audit should catch:
- Broken internal links, pointing to pages that no longer exist.
- Nofollow internal links, which stop authority from passing even though the link is there.
- Pages with only one incoming internal link, which are harder for search engines to find and rank.
- Links pointing to redirected URLs instead of the final destination, which wastes crawl budget and slows down the user’s path.
- Pages sitting too deep in your structure, more than three clicks from the homepage.
Set alt attributes to image links
When adding an image link on a page, you should add the alt attribute describing what the image is about. This gives Google extra information about the page you’re linking to, on top of helping accessibility.
Put contextual links in the main content.
As covered above, links placed within your main content carry more SEO value than ones sitting in a footer or sidebar. Contextual links also provide information and value to the text itself, and both the surrounding copy and the anchor text you choose matter for how well the linked page ranks.
There’s no fixed number, but a good guideline is to link enough to genuinely help navigation and relevance without overwhelming the page. If a paragraph starts to feel like a list of links rather than a sentence, it’s too many.
Yes. A clean internal linking structure with no broken links, redirects, or unnecessary depth helps crawlers spend their budget on pages worth indexing, instead of wasting it on dead ends.
Not directly, but a page overloaded with links dilutes the authority passed to each one and can read as spammy to both users and search engines, which indirectly affects how that page performs.
Site architecture is the overall shape of your site, how pages are grouped and organized. Internal linking is how you actually connect those pages to each other. Good architecture makes good internal linking much easier to execute consistently.
