Internal Linking for SEO: A Practical Guide
What is internal linking in SEO?
Internal linking means linking from one page of your website to another page on the same site. Internal links help search engines discover pages, understand how topics relate and judge which pages matter most, and they help visitors find the next useful page. Effective internal links are crawlable HTML anchors with descriptive anchor text, placed where they genuinely help the reader.
Why internal links matter for SEO
- Discovery: crawlers find most pages by following links. A page with no internal links pointing to it, an orphan page, may be found only through a sitemap, or not at all.
- Context: anchor text and the surrounding words tell search engines what the target page is about.
- Importance: pages that receive many internal links, especially from strong pages, are treated as more important within the site.
- User journeys: links move readers from an explainer to a deeper guide or from a guide to a product or service page.
Unlike backlinks, which depend on other sites and are covered under off-page SEO, internal links are entirely under your control.
Crawlable links: what search engines can follow
Google reliably follows <a> elements with an href attribute containing a resolvable URL. Links that exist only as JavaScript click handlers may never be crawled.
Crawlable:
<a href="/seo/technical-seo/">technical SEO guide</a>
Not reliably crawlable:
<span onclick="goTo('/seo/technical-seo/')">technical SEO guide</span>
<a onclick="goTo('/seo/technical-seo/')">technical SEO guide</a>Single-page applications and menus built with JavaScript frameworks often fall into this trap; see JavaScript SEO for how to check rendered links.
Choosing anchor text
| Anchor type | Example | Verdict |
|---|---|---|
| Descriptive | guide to canonical tags | Clear for users and search engines |
| Generic | click here, read more | Gives almost no context; avoid as the main anchor |
| Exact match repeated everywhere | seo course delhi on every link sitewide | Looks mechanical; vary the wording |
| Naked URL | www.example.com/guide/ | Acceptable occasionally |
| Image link | Alt text acts as the anchor | Write meaningful alt text |
Write the anchor so a reader knows what they will get before clicking. Natural variation is fine and expected: the same page can be linked as "canonical tags", "how canonicalisation works" or "choosing a preferred URL".
Site structure and click depth
Click depth is the number of clicks needed to reach a page from the homepage. Important pages should sit close to the top, and related pages should link to each other. A hub-and-spoke structure works well for most content sites:
Home
└── /seo/ (hub)
├── /seo/seo-basics/
├── /seo/technical-seo/ ──> links to /seo/javascript-seo/
├── /seo/javascript-seo/
└── /seo/internal-linking/This site follows the same pattern: SEO guides sit under one hub, link to closely related guides, and link to the SEO course page where a reader may want structured, project-based learning. Breadcrumbs reinforce the hierarchy for both users and search engines.
Large sites need extra care. On an e-commerce category with many pages of products, make sure paginated pages link to each other with normal links so crawlers can reach older products. Automated "related posts" widgets help, but they often pick links by shared tags rather than real relevance, so add hand-picked contextual links to your most important pages as well.
A practical internal linking process
- List your priority pages: services, key categories and cornerstone guides.
- Crawl the site with a tool such as Screaming Frog and compare crawled URLs with your sitemap to find orphan pages.
- Use the Links report in Search Console to see which pages receive the fewest internal links.
- Search your own site for mentions of each priority topic, for example with
site:example.com "canonical tag", and add contextual links where they help. - Fix internal links that point to redirects or broken URLs, linking straight to the final canonical URL.
- Whenever you publish a page, add links to it from several older related pages.
Link reviews fit naturally into a regular technical SEO audit.
Nofollow, redirects and other details
- Do not add
rel="nofollow"to internal links to "sculpt" PageRank; it does not redirect value elsewhere and can hide pages from discovery. - Link to the canonical version of each URL, including the correct trailing slash and protocol, so you do not send mixed signals.
- There is no fixed limit on links per page, but a page with hundreds of links dilutes the value and usefulness of each.
- Keep anchor text honest; a link that promises one thing and delivers another frustrates readers.
For hands-on practice in planning site structure and link audits, SkillNewton's online course in search optimisation covers it as part of its project work.
Common mistakes
- Leaving orphan pages that are listed in the sitemap but linked from nowhere.
- Using "click here" or "read more" as the anchor text for most links.
- Adding nofollow to internal links in an attempt to control PageRank.
- Linking to URLs that redirect or return 404 instead of the final URL.
- Stuffing footers with dozens of exact-match keyword links.
Frequently asked questions
How many internal links should a page have?
There is no ideal number. Add links wherever they help the reader take a logical next step, and avoid long lists of loosely related links that nobody would click.
Do navigation menu links count as internal links?
Yes. They help crawlers discover pages and signal importance. Contextual links in body content add more topical context, so the strongest setup uses both.
Can internal links cause keyword cannibalisation?
They can contribute to it. If many anchors that describe one topic point to two different pages, search engines receive mixed signals. Decide which page owns the topic and point those links to it.
Are internal links as valuable as backlinks?
They do different jobs. Backlinks bring authority from outside the site, while internal links distribute and direct that authority and context within it. A site needs both.