Most beginners treat every new blog post like an island. They research a keyword, write the best article they can, publish it, share it once, and move on to the next one. A few months later they have thirty or forty posts — and almost no traffic to show for them, because none of those posts help each other. Internal linking is how you fix that. It is the practice of linking your own pages to each other inside your content, and it is one of the few SEO levers you control completely: no outreach, no budget, and no waiting on anyone else. This guide explains what internal links actually do, how many you need, what the clickable words should say, and a simple routine you can run on a small affiliate site starting today.
Disclosure: This post contains affiliate links. If you sign up through one of these links, I may earn a commission at no extra cost to you.
What internal links actually do
An internal link is any link from one page of your site to another page of the same site. That sounds trivial, but those links do three separate jobs at once.
First, they help search engines find your pages. Google discovers content largely by following links. A page that no other page links to is called an orphan page, and crawlers may rarely visit it — or miss it entirely. Every post you publish should be reachable by following links from the rest of your site.
Second, internal links pass ranking strength around your site. Pages that earn backlinks or traffic accumulate a kind of authority, and links from those pages share some of it with the pages they point to. A strong older post can lift a newer, weaker one simply by linking to it in a relevant paragraph.
Third, they keep readers moving. A visitor who finishes one article and clicks into a second one is far more likely to trust you, join your email list, and eventually click an affiliate link. Internal links are reader guidance first, and SEO second — if a link would not genuinely help the person reading, it does not belong there.
How many internal links does a post need?
There is no magic number, and any tool that promises one is guessing. A practical rule for a beginner affiliate site works well: every new post should contain roughly three to five contextual links to other relevant posts, and it should receive at least two or three links from older posts shortly after it publishes.
That second half is the part most people skip. Linking out from a new post is easy because you are already in the editor. Going back into two or three older, related posts and adding a link forward to the new one takes an extra ten minutes — and it is what stops the new post from launching as an orphan.
Also keep click depth in mind. Priority pages should be reachable within about three clicks from your homepage, through your menu, category pages, and in-content links. Pages buried five or six clicks deep get crawled less often and rarely rank well, no matter how good they are.
Anchor text: the words you make clickable
Anchor text is the visible, clickable wording of a link, and it tells both readers and Google what the destination page is about. Linking to your keyword research tutorial with the anchor “how to do keyword research” sends a clear relevance signal. Linking to it as “click here” sends almost none.
Google’s own link guidance asks for anchor text that is descriptive, reasonably concise, and relevant to the page it points to. Three habits cover most of it:
- Describe the destination. The anchor should let a reader predict what they will find before they click.
- Vary your wording. Link to the same page with different natural phrasings across your site. Using the identical exact-match keyword as the anchor every single time looks manufactured and reads awkwardly.
- Write it as part of the sentence. The best anchors are ones a writer would produce without thinking about SEO at all — a natural phrase inside a helpful sentence.
Avoid generic anchors like “read more” and “this post,” avoid linking the same phrase twice on one page to two different destinations, and never force a link into a paragraph where it does not help the reader. Relevance beats volume every time.
Build hubs, not spaghetti
Random linking helps a little. Structured linking helps a lot. The structure that works for affiliate sites is the hub-and-spoke model: one broad pillar page covers a topic in depth, and several narrower supporting posts each cover one subtopic and link back up to the pillar, while the pillar links down to each of them.
If you have already read our guide to building a content cluster for affiliate marketing, internal linking is the connective tissue that makes a cluster work. Without the links, you do not have a cluster — you just have several posts that happen to be about similar things. With them, Google can see which page is your main answer for the big topic and which pages support it, and readers can move between the overview and the details without hitting a dead end.
On an affiliate site, your commercial pages — reviews and comparisons — usually deserve the most internal support, because they are the pages that earn. A sensible pattern is to let your informational posts do the ranking and teaching, then link from them, where it is genuinely relevant, into the review or comparison that helps the reader act. One natural money-page link inside a helpful article converts better than five forced ones.
A simple audit you can run in an afternoon
You do not need paid software to find your biggest internal linking problems. Work through these five checks:
- Find orphan pages. List your published posts and check which ones receive no in-content links from other posts. Your sitemap and category pages do not count — look for real links inside articles. Give every orphan at least two contextual links from closely related posts.
- Find your striking-distance pages. In Search Console’s Performance report, look for pages sitting around positions 5 to 20 with real impressions. Those pages are close, and extra internal links from relevant posts are one of the cheapest ways to push them. Our beginner’s guide to using Google Search Console for affiliate marketing shows exactly where to find those numbers.
- Fix broken internal links. Links pointing at deleted posts or old URLs waste crawl attention and frustrate readers. Update them to the current destination rather than leaving redirects to do the work.
- Check your strongest pages. Posts with the most traffic or backlinks pass the most value. Make sure each one links onward to two or three relevant pages you want to lift. This matters because the backlinks you earn for a new affiliate website only spread around your site if your internal links carry them there.
- Prune pointless links. If a post links to something barely related “just for SEO,” remove it. Fewer, more relevant links pass more value each and read better.
Make it part of publishing, not a rescue mission
The bloggers who end up with a linking mess are the ones who treat internal linking as a someday cleanup project. The fix is a five-minute habit attached to every publish:
- Before you write, note two or three existing posts the new one will link to, and work them into the draft naturally.
- After publishing, open two older related posts and add a sentence linking forward to the new post.
- Run through the small details in our on-page SEO checklist for affiliate blog posts, where internal links sit alongside titles, headings, and images.
- Once a quarter, repeat the afternoon audit above. Sites change; links should change with them.
None of this requires a new tool. If your site is built inside a platform that bundles hosting, training, and keyword research in one place, the linking itself is still your job — no platform does it for you. If you want to see the setup many beginners here use, you can start free at Wealthy Affiliate and pair it with the free bonuses on this page while you build out your first cluster.
The honest bottom line
Internal linking will not rescue weak content, and it will not manufacture traffic out of nothing. What it does is make sure the content you already worked hard on actually gets found, gets crawled, and gets read in sequence instead of in isolation. On a small affiliate site, that is often the difference between forty disconnected posts and one coherent site that compounds. Start with the orphans, support the pages closest to ranking, link every new post in both directions, and let the habit do the heavy lifting. If you are building your site from scratch and want the training and tools in one place, Wealthy Affiliate’s free starter option is a reasonable place to begin — and the Wealthy Trail free bonuses are there to help you get more from it either way.