Internal and external linking still matter a lot for SEO, but the old rules need updating. Good linking helps search engines discover pages, understand relationships between topics, and interpret which content matters most on your site. It also improves navigation for users, which is just as important. Google explicitly says links help it discover pages and evaluate relevance, and it recommends using crawlable <a> links with meaningful anchor text.
What has changed is the way we think about “optimisation”. It is no longer about stuffing exact-match anchors, adding huge numbers of links, or chasing arbitrary thresholds. Today, the goal is to build a clean, useful linking system: one that supports crawling, clarifies topic structure, and guides people naturally from one useful page to the next. Google also recommends qualifying certain outbound links properly with rel attributes such as ‘nofollow’, ‘ugc’, and ‘sponsored’ when relevant.
What internal linking should achieve
A strong internal linking structure should do three things well. First, it should ensure that important pages can be found and crawled. Second, it should help search engines understand which pages are closely related. Third, it should guide visitors toward the next useful step, whether that is another article, a category page, a product, or a conversion page. Google has long described link architecture as important for both discovery and user navigation.
If a page has no internal links pointing to it, it becomes much harder for search engines and users to reach it. These orphan pages often underperform, not because the content is bad, but because the page is disconnected from the rest of the site. XML sitemaps help with discovery, but they do not replace contextual internal links. Google says most pages are discovered through links, not manual submission.
Updated internal linking checklist
Every important page should be reachable through at least one crawlable text link. In practice, the better target is more than one, especially for commercial or strategic pages.
Use standard HTML links whenever possible. Google recommends crawlable <a href=”…”> links, and while JavaScript-inserted links can work, they still need to follow crawlable link best practices. If navigation depends on non-standard link behaviour, discovery and crawling can suffer.
Anchor text should be descriptive, natural, and varied. It is good to use relevant phrases in internal links, but not to repeat the same aggressive commercial anchor again and again. A healthy internal anchor profile usually mixes exact topic phrases, longer descriptive anchors, brand terms, and natural language.
Link where it helps the user. The “Wikipedia principle” is still one of the best mental models: if a reader is likely to want more context, a supporting link makes sense. If the link feels forced, it probably is.
Keep navigation accessible without relying entirely on complex JavaScript. Core menus, category paths, and other critical navigation elements should remain easy for crawlers to interpret. Google can process JavaScript, but plain crawlable links are still the safest and clearest option for key paths.
Fix broken internal links quickly. Internal links pointing to 404 pages waste crawl attention and create a poor experience.
Do not obsess over a fixed maximum number of internal links per page. The old “100 links” and later “200 links” rules are outdated. The real standard now is practical: keep links useful, manageable, and not excessive for the purpose of the page. On very large sites, bloated navigation and repetitive cross-linking can still dilute clarity and waste crawl attention, but there is no modern Google rule that says a page becomes bad after a specific number. Google’s crawl budget guidance is mainly relevant for very large, frequently updated sites.
Internal linking mistakes to avoid
One common mistake is linking every page to everything. That does not create authority; it creates noise. Another is using identical keyword-rich anchors sitewide, especially on commercial pages. That looks manipulative and weakens semantic variety.
A third mistake is hiding key pages too deep in the site structure. Important pages should be linked from places that make sense and that already receive attention, such as main categories, top guides, or hub pages.
A fourth is relying only on sitemaps for discovery. Sitemaps support indexing, but they do not provide the same contextual signals as in-content and navigational links.
How to handle outbound links properly
Outbound links are not bad for SEO. In fact, linking out to useful, relevant, trustworthy sources is normal and healthy. It helps users, adds context, and fits the natural structure of the web. Google specifically says regular editorial links do not need any qualifying rel attribute when they are normal links you trust.
The key is moderation and intent. If you link to a relevant source because it adds value, that is fine. If the link is user-generated, paid, sponsored, affiliate-driven, or otherwise not fully editorially vouched for, then use the appropriate rel value. Google recommends:
- rel=”sponsored” for paid or sponsored links
- rel=”ugc” for user-generated links such as comments or forum posts
- rel=”nofollow” when you do not want to imply endorsement or when other rel values are not practical
For comments, forum posts, or any area where visitors can add links, moderation is essential. If you allow unmoderated outbound links, you increase the risk of spam and low-quality associations. Google’s spam policies are clear that manipulative link practices can cause ranking issues.
External backlinks: what actually matters now
When building backlinks to your own site, quality matters more than raw volume. The goal is not just “more links”. The goal is more relevant, trustworthy, editorially meaningful links from domains that make sense in your niche.
Unique referring domains remain more valuable than repeatedly getting links from the same small set of sites, especially when the aim is to grow overall authority and visibility. That does not mean repeat links are useless, but growth across unique domains is generally a stronger signal of broader recognition.
Anchor text should stay natural. Overusing commercial exact-match anchors in external backlinks remains risky. A healthier profile typically includes mostly branded, URL, generic, and naturally descriptive anchors, with only a limited proportion of keyword-focused anchors. Google’s spam policies still warn against manipulative linking intended to game rankings.
Thematic relevance also matters. A link from a page that is topically connected to your content is usually more useful than a random mention from an unrelated page. That said, do not interpret relevance too narrowly. If you sell air conditioners, links from HVAC sites are strong, but so can links from home improvement, real estate, energy-saving, renovation, and lifestyle publications when the context fits.
A smarter off-page checklist
Aim for a steady, natural growth pattern in links rather than bursts of low-quality placements.
Prioritise links from pages and domains that are trusted, indexed, and contextually relevant.
Watch your anchor text mix. Keep branded and natural anchors dominant.
Track lost links as well as new ones. Link monitoring helps protect the work you have already done.
Audit your backlink profile regularly for spam, negative SEO patterns, and suspicious placements.
Treat digital PR, useful tools, original research, expert contributions, guest articles, and resource mentions as stronger long-term strategies than low-value link schemes.
What to monitor
For internal linking, monitor orphan pages, broken links, depth from the homepage, number of internal links to strategic pages, and anchor text patterns.
For external linking, monitor referring domains, lost links, toxic or suspicious links, anchor text distribution, and the relevance of linking pages.
For outbound links, review whether important external links are still live, whether they still point to trustworthy pages, and whether user-generated links are properly moderated and qualified.
Final takeaway
Internal and external linking should not be treated as separate technical chores. Together, they shape how your site is discovered, understood, trusted, and used.
Good internal linking creates order. Good outbound linking adds credibility. Good backlinks build authority.
The best checklist is simple: make links useful, make them crawlable, make them relevant, and keep them under control.
