Internal linking is the part of SEO that gets the least attention and offers some of the best return for the effort involved. Unlike backlinks, which depend on someone else deciding your content is worth referencing, internal links are entirely within your control. You decide which pages connect to which, and that decision shapes how both readers and search engines understand what matters on your site.
This post covers how to build an internal linking strategy deliberately, rather than relying on whatever a “related posts” plugin happens to surface.
Why Internal Links Matter as Much as They Do
Search engines rely heavily on links, internal and external, to understand which pages on a site are important and how topics relate to each other. A page that receives many internal links from relevant, well-established pages tends to be treated as more significant than an identical page sitting with no internal links at all, which is really the core problem behind the orphaned posts discussed earlier in this series.
Readers respond to internal links too, just for more obvious reasons. A well-placed link that answers a natural follow-up question keeps someone reading your site instead of bouncing back to search results. Multiply that across a whole blog, and the difference between a site with a deliberate linking structure and one without shows up clearly in pages-per-session and average time on site, both of which correlate with better long-term rankings.
Linking With Intent, Not Obligation
The most common failure in internal linking isn’t linking too little, it’s linking without a reason. A link dropped into a paragraph because a plugin suggested it, or because a writer felt obligated to reference an old post, tends to read as exactly what it is — an interruption rather than a genuine next step for the reader.
A better standard is to ask whether the sentence containing the link would still make sense and still be useful if the link were removed. If a link only exists because you wanted to link somewhere, and the surrounding sentence is otherwise empty of meaning, that’s a sign the link is serving the site’s structure at the expense of the reader, rather than serving both at once.
Anchor Text That Actually Describes the Destination
Anchor text — the clickable words themselves — carries meaning for both readers and search engines, and vague anchor text wastes that signal. Linking the words “click here” or “this post” tells a reader almost nothing about what they’ll find on the other side, and tells a search engine even less about the topic of the destination page.
Descriptive anchor text that reflects the actual topic of the linked page, worked naturally into the sentence, does double duty: it sets accurate reader expectations and reinforces topical relevance for the page being linked to. This matters enough that it’s worth a quick pass over old posts specifically to fix generic anchor text, even without touching anything else about the post.
How Deep Should Links Go
A useful mental model is to think of your site’s pages arranged in a hierarchy going from broad to narrow — homepage, then pillar pages, then cluster posts, then perhaps very narrow supporting notes underneath those. Links should flow generously in both directions between adjacent levels of that hierarchy: pillar pages linking down into their cluster posts, and cluster posts linking back up to their pillar, as covered in the pillar page guide earlier in this series.
Links that skip levels — a narrow cluster post linking directly to another unrelated narrow post several clusters away — are fine occasionally when genuinely relevant, but shouldn’t be the backbone of your linking strategy. The backbone should be the pillar-to-cluster relationship, since that’s what gives search engines the clearest signal about how your content is organized by topic.
Auditing Your Existing Links
If you’ve already gone through the content audit covered earlier in this series, you likely have a rough map of which posts belong to which topic groups. The next step is going through that map and checking, post by post, whether the links that should exist actually do.
This is slower going than it sounds, because it requires actually reading each post to find natural linking opportunities rather than just checking a box that says “this post links somewhere.” A post might technically contain three internal links and still be poorly linked, if all three point to unrelated tangents rather than the genuinely relevant posts sitting right next to it in the same cluster. Reading every post in a cluster with an eye specifically toward missing or weak links is exactly the kind of pattern-matching task that becomes tedious past a few dozen posts and is well suited to being done automatically at scale, even though the actual decision of where a link belongs still benefits from a quick human sanity check.
Fixing Old Posts Without Rewriting Them
A useful habit is treating internal linking as something you can improve without touching the rest of a post. Going back through an old article purely to add two or three well-placed links, without otherwise editing it, is a low-risk, high-value task, since it doesn’t disturb whatever is already working about the post while still improving its position in your site’s overall structure.
This is also a good use of time immediately after publishing something new. A freshly published post has no incoming links yet by definition, so the first task after hitting publish should be going to two or three related older posts and adding a link into the new one, rather than waiting for a future audit to notice the gap.
Navigation and Non-Contextual Links
Everything above concerns links inside the body of an article, sometimes called contextual links, which tend to carry the most weight because they’re chosen deliberately rather than generated automatically. Navigation menus, footer links, and “related posts” widgets matter too, but they carry less individual weight per link since they appear identically across many pages rather than being chosen for a specific piece of content.
That doesn’t make them worthless. A well-curated “related posts” section that actually reflects genuine topical relationship, rather than just the most recent five posts regardless of subject, still helps readers and still reinforces cluster structure. It just shouldn’t be treated as a substitute for deliberate contextual linking within the article itself.
A Simple Standard to Hold Every New Post To
Before publishing anything new, a workable minimum standard is that the post links up to its relevant pillar page, links across to at least one or two genuinely related cluster posts, and receives at least one link back from an existing post shortly after publication, rather than being left to sit as an orphan until some future audit catches it. Holding every new post to that standard from the start prevents most of the linking problems this series has covered from ever accumulating in the first place.
The next post in this series looks at a related but distinct problem: what happens when multiple posts end up covering nearly the same ground, and how to tell the difference between healthy topical depth and genuine content duplication worth merging.