Internal linking: the cheapest SEO lever you're underusing

What internal links actually do

Three jobs, all of them load-bearing:

• Discovery. Crawlers find your pages by following links from pages they already know. A page nobody links to (an orphan) may never be crawled at all — the sitemap helps, but links are the primary road network.
• Authority flow. Ranking strength (link equity) moves through links. Your homepage and top content accumulate it; internal links decide where it goes next. Pages buried five clicks deep receive a trickle.
• Meaning. The clickable words — the anchor text — tell search engines what the target page is about. Fifty internal links saying “pricing calculator” are a strong hint about what that page should rank for. Fifty saying “click here” are fifty wasted hints.

The structure that works: hubs and spokes

Strong sites converge on the same shape: hub pages that own a topic and link down to specific children, children that link back up and sideways to siblings. A guide hub links every guide; each guide links related guides and its hub. The pattern does three things at once: no orphans, authority pools around topics (search engines notice topical clusters), and every visitor always has a next step.

Practical rules that fall out of it:

• Every new page gets links from at least two places — its hub, plus a contextual mention somewhere relevant. Publishing a page without linking it is publishing it into a drawer.
• Keep important pages ≤3 clicks from the homepage. Depth is a statement about importance, whether you meant it or not.
• One topic, one canonical page — and everything else about that topic links to it rather than competing with it (the cure for keyword cannibalization).
• Link where the reader actually benefits. Forced links get ignored by readers and, increasingly, discounted by engines. Three good contextual links beat fifteen decorative ones.

Anchor text: say where the link goes

The test is simple: read the anchor out of context. “Click here” tells you nothing; “see the title-tag guide” tells you everything. Descriptive anchors help screen-reader users (who often navigate by jumping between links), help readers decide whether to click, and give search engines the strongest available description of the target.

• Weak: click here · read more · this page · learn more
• Strong: how meta descriptions affect click-through · PicoRank's pricing formula · the SEO glossary
• Vary the wording naturally across links to the same page — identical exact-match anchors everywhere reads (and is) mechanical.

Auditing a real site

1. Crawl and map the graph. You want, per page: inbound internal links, outbound links, depth from the homepage, and the anchors used. (This is exactly what a crawler-based audit produces — clicking around won't reveal your own orphans.)
2. Fix orphans and near-orphans first. Pages with zero or one inbound link are your quickest wins: link them from their natural hub and one contextual spot.
3. Rescue deep pages that matter. Anything important sitting 4+ clicks deep needs a shortcut from somewhere strong.
4. Rewrite generic anchors where they carry content weight — body copy first; utility navigation labels ("Blog", "Contact") are fine as-is.
5. Re-crawl and compare. Link graphs drift as content grows; this is a quarterly habit, not a one-off.