Internal linking matters for three concrete reasons: crawl efficiency, authority distribution, and user experience. When you link between pages on your domain, you create pathways for Google's crawlers to find content faster and signal which pages matter most. A page with 20 internal links pointing to it tells search engines it's more important than one with two links. From an authority standpoint, internal links pass PageRank between your pages. If your homepage has strong backlinks, strategic internal linking pushes some of that authority to your service pages or blog posts. This is free juice you already own but most sites waste. We've seen service pages jump from page 3 to page 1 just by adding contextual links from related high-authority pages on the same domain. For users, internal links reduce bounce rates and increase time on site by offering relevant next steps. Someone reading about keyword research should see a link to your on-page optimization guide. This creates topic clusters that Google recognizes as comprehensive coverage of a subject, which favors your rankings for broader terms. Practically, aim for 2–5 contextual internal links per page, using descriptive anchor text that includes target keywords naturally. Avoid generic phrases like "click here" because you're wasting an opportunity to signal relevance. Also avoid overlinking the same page repeatedly from one article, that looks manipulative. At Ottawa SEO, we audit internal linking structure during every technical SEO review because it's one of the fastest wins. Most sites have orphan pages with zero internal links or important pages buried six clicks deep from the homepage. Fixing link architecture often delivers ranking improvements within 2–4 weeks, faster than waiting for new backlinks. The key is intentionality: every link should serve either the user's journey or your keyword strategy, ideally both.