What Are Internal Links and Why Do They Matter for SEO?
An internal link is a hyperlink from one page to another page on the same domain. Linking from a blog post to a service page, or from your homepage to a category page, are both examples of internal links. Google finds new pages by following links from pages it already knows about. If a page has no internal links pointing to it, Googlebot may never discover it. Internal links also pass link equity (link value) between pages, which influences how Google assesses page authority when determining search rankings. For businesses investing in SEO marketing in Singapore, a clear internal linking structure helps Google understand which pages matter most and how your content relates to each other.How to Write Effective Anchor Text for Internal Links
Anchor text is the visible, clickable text within a hyperlink. Google uses anchor text as a signal to understand what the linked page is about. Writing clear, descriptive anchor text for your internal links helps both search engines and users navigate your site.Making Anchor Text Descriptive and Relevant
Good anchor text tells the reader and Google what to expect on the linked page. Avoid generic phrases like “click here”, “read more”, or “this page” as link text. These phrases provide no semantic context about the destination page.Google recommends a simple test:
Read the anchor text on its own, without the surrounding sentence. If you cannot tell what the linked page is about from the anchor text alone, it needs to be more specific.Keeping Anchor Text Concise
While anchor text should be descriptive, it should not be excessively long. Wrapping an entire sentence in a hyperlink dilutes the relevance signal for Google and makes it harder for users to identify what the link refers to. A few words to a short phrase that captures the topic of the linked page is a good length to aim for.Avoiding Keyword Stuffing in Anchor Text
Do not cram every relevant keyword into your anchor text. Google’s spam policies flag keyword stuffing, and this applies to link text as well. The anchor text should read naturally within the sentence. Bad example: “sports injury physiotherapy assessment and treatment” Good example: A cleaner option would be “sports injury assessment” or “physiotherapy for sports injuries“.Spacing Internal Links with Surrounding Context
Google recommends against placing multiple links directly next to each other without surrounding text. When links are chained together, readers struggle to distinguish between them, and Google loses the surrounding text context that helps it understand each link’s purpose. Space your links across the content with relevant sentences around each one. This gives every link its own semantic environment and makes the content easier to read.Internal Linking Strategies That Improve Site Structure
A strong internal linking strategy creates clear pathways between related pages so that Googlebot can discover your full site and users can find relevant information without difficulty.Linking from High-Authority Pages to Important Pages
Pages that receive the most backlinks from external websites carry the most link equity. Linking from these high-authority pages to other pages you want to rank distributes that equity across your site. For most websites, the homepage is the strongest page in terms of link equity. Ensure that your most important category or service pages are accessible within one or two clicks from the homepage. If you run a multi-location medical practice in Singapore, your homepage should link to each clinic location page, and each location page should link to the specific services offered at that branch.Using Contextual Links Within Body Content
Contextual links are internal links placed within the body text of a page, surrounded by relevant content. These carry more SEO weight than navigational links in headers or footers because Google can use the surrounding text to better understand the relationship between the two pages. When writing a blog post about managing back pain, for instance, you could naturally link to your physiotherapy service page within a relevant paragraph. The surrounding sentences give Google additional context about why these two pages are related.Using Content Hierarchy with Pillar and Cluster Pages
A pillar and cluster model organises your content into groups. A pillar page covers a broad topic, and cluster pages cover specific subtopics within that area. Each cluster page links back to the pillar page, and the pillar page links to each cluster page. Example: For a Singapore-based aesthetic clinic, a pillar page on “skin treatments” could link to cluster pages on specific treatments like chemical peels, laser resurfacing, and microneedling. Each cluster page would link back to the main skin treatments page. This structure signals to Google that the pillar page is the central authority on that topic.Ensuring Every Page Has at Least One Internal Link
Google states that every page you want indexed should have at least one internal link pointing to it from another page on your site. Pages with no internal links are called orphan pages, and Googlebot may not discover them even if they appear in your XML sitemap. Run a crawl audit using tools like Screaming Frog or Sitebulb to identify orphan pages. Once identified, add relevant internal links from existing content to those pages.How Many Internal Links Should a Page Have?
Google’s documentation states that there is no ideal number of internal links per page. The guidance is straightforward: if you think a page has too many links, it probably does. The priority should be relevance. Each internal link on a page should serve a purpose for the reader. Linking to a page that has no topical connection to the content the user is reading adds noise without value. For longer blog articles (1,500 words and above), 5 to 15 internal links is common. For shorter service pages, 3 to 5 internal links to related services or supporting content is a reasonable range. These are not fixed rules, but they provide a practical starting point.Common Internal Linking Mistakes That Hurt SEO Performance
Several internal linking errors can reduce the effectiveness of your site’s link structure. Being aware of these issues helps you avoid problems during implementation and site audits.Broken Internal Links Returning 404 Errors
Broken links point to pages that no longer exist. When Googlebot encounters a 404 error from an internal link, it wastes crawl budget and creates a dead end in your link structure. Audit your site for broken internal links regularly using Google Search Console’s coverage report or a crawling tool.Over-Optimised Anchor Text Across Multiple Pages
If every internal link pointing to your “dental implants” page uses the exact anchor text “dental implants Singapore”, this pattern looks unnatural to Google. Vary your anchor text while keeping it relevant. Use variations like “implant procedures”, “dental implant options”, or “tooth replacement treatments” to maintain a natural link profile.Linking to Redirected URLs Instead of Final Destinations
When you update your URL structure, old internal links may still point to the original URLs that now redirect. Each redirect adds an unnecessary step for Googlebot and slows the transfer of link equity. Update your internal links to point directly to the final destination URL whenever you change your URL structure.Relying on Navigation Links as Your Only Internal Linking Method
Navigation menus in your site header and footer provide internal links, but they appear on every page. Google treats these as sitewide navigational elements. They carry less contextual relevance than in-content links because they lack surrounding topical text. Use contextual body links alongside your navigation to strengthen your internal link structure.How External Links Fit into Your Linking Strategy
While this article focuses on internal linking, external links are part of Google’s link best practices and worth understanding for a complete linking strategy. An external link points from your website to a page on a different domain. Google sees external links as a way to establish trustworthiness, especially when you cite credible sources. Linking to a government health advisory from Singapore’s Ministry of Health (MOH) in a medical blog post, for instance, signals that your content references authoritative information.When to Use Nofollow, Sponsored, and UGC Link Attributes
Google provides three link attributes for qualifying external links:rel=”nofollow”
Use this when you do not want to endorse the linked site. If you are referencing a competitor’s claim to counter it, you may not want to pass link equity to their page.rel=”sponsored”
Use this for links placed as part of a paid arrangement, such as sponsored content or affiliate links. This is a requirement under Google’s spam policies.rel=”ugc”
Use this for links in user-generated content, such as forum posts, blog comments, or community discussion boards. This tells Google the link was not editorially placed by you. You do not need to add nofollow to every external link on your site. Linking to credible, relevant external sources without any rel attribute is normal and expected by Google. Only apply these attributes when the context calls for it.Technical Implementation: How to Make Internal Links Crawlable
This section covers the HTML requirements for making your links crawlable by Googlebot. These fall under technical SEO, and if you are working with a web developer, these specifications will help ensure your internal links are implemented correctly.
Using the Correct HTML Markup for Links
Google can only follow a link if it uses a standard <a> HTML element (anchor element) with an href attribute. This is the format Googlebot reliably parses:
<a href="https://example.com/services">Our Services</a> <a href="/blog/seo-guide">SEO Guide</a>
Links that use non-standard HTML elements or rely on JavaScript event handlers without an <a> tag are unreliable for crawling. Google may attempt to parse them, but there is no guarantee:
<span href="https://example.com">Link text</span>
<a onclick="goto('https://example.com')">Link text</a>
<div class="link" data-url="/page">Link text</div>
If your website uses a JavaScript framework like React or Angular, internal links inserted dynamically are still crawlable provided the rendered HTML outputs a proper <a> element with an href attribute. Verify this using Google Search Console’s URL Inspection Tool to check the rendered HTML of your pages.
Ensuring Link URLs Resolve to Real Pages
The URL inside your href attribute must resolve to an actual web address that Googlebot can request. The link should point to a valid URI, whether as an absolute URL or a relative path.
Links that use JavaScript for navigation instead of pointing to a real URL are not recommended:
<a href="javascript:goTo('products')">Products</a>
<a href="javascript:window.location.href='/products'">Products</a>
<a href="https://example.com/products">Products</a> <a href="/products">Products</a>
If you are working with a web developer, ensure that all navigation menus, footer links, and in-content links use proper <a> elements with resolvable URLs. This is a common issue on websites built with single-page application frameworks where routing is handled client-side.
Using Image Alt Text as Anchor Text for Image Links
When an image is wrapped in a link, Google uses the image’s alt attribute as the anchor text. If the image serves as a navigation element, the alt text needs to be descriptive.
Good: Descriptive alt text acts as anchor text
<a href="/services/orthodontics"> <img src="braces-consultation.jpg" alt="book an orthodontics consultation" /> </a>
Bad: empty alt text provides no anchor text signal
<a href="/services/orthodontics"> <img src="braces-consultation.jpg" alt="" /> </a>This applies to image-based navigation, banner links, and call-to-action buttons that use images. Without descriptive alt text, Google cannot determine what the linked page is about from that particular link.
Strengthening Your Website’s Internal Link Structure for SEO
Internal linking requires ongoing attention as your website grows. Each new page you publish is an opportunity to add internal links to and from existing content. Review older pages periodically to identify where new internal links would benefit readers and help Googlebot discover related content. For businesses focused on SEO marketing in Singapore, a well-structured internal linking system supports every other SEO effort on your site. Start with a crawl audit to identify gaps, then build your linking strategy around topical relevance and clear anchor text.FAQs on Linking Best Practices for Google SEO
These FAQs cover the internal linking questions I often get from clients and non-technical colleagues. If you still have any more questions regarding internal linking best practices, feel free message me on my LinkedIn
How many internal links for SEO?
There’s no fixed number. I usually focus on adding enough internal links to guide users and highlight key pages without forcing the keyword into the anchor text.
On most blog posts, that often means linking to relevant supporting articles, cornerstone pages, and related services where it makes sense in context.
What type of link is best for SEO?
Contextual links using exact-match/semantically-related keywords within the main content tend to carry the most value because they help search engines understand relationships between topics.
In my work, I prioritise using exact-match keywords placed naturally in relevant paragraphs as naturally as possible across different pages.
Are internal links good for SEO?
Yes. Internal links help search engines discover pages, understand site structure, and pass authority to important content.
I’ve seen strong improvements in rankings after tightening internal linking across key pages, especially when supporting topic clusters.
Can you have too many internal links?
While there’s no strict limit, from my experience, too many internal links can dilute authority signals: eeach internal link divides the available PageRank. When links are scattered or excessive, the most important pages receive less value.
Do broken links hurt SEO?
Yes, they can affect both user experience and crawling. When I audit sites, fixing broken internal links often helps search engines crawl more efficiently and prevents authority from leaking to dead pages. Keeping links updated is a simple but important maintenance task.
