Internal linking is primarily on-page SEO, but it has significant technical SEO implications. You implement links within your content and navigation, which makes it an on-page task. You choose anchor text, decide placement, and control user flow—all editorial decisions. That's classic on-page work. The technical side kicks in when you consider how those links affect crawl budget, site architecture, and PageRank distribution. Search engines follow internal links to discover pages, so your linking structure dictates what gets crawled and indexed. A page buried six clicks deep might never get crawled if your internal linking is weak. Conversely, a strong hub-and-spoke model can push authority to conversion pages that need it. At Ottawa SEO, we treat internal linking as an on-page discipline with technical guardrails. When auditing a 50-page site, we map link depth and ensure every important page sits within three clicks of the homepage. For larger sites—say 500+ pages—we use crawl tools to identify orphaned pages and broken link chains, which is pure technical work. We also monitor how link equity flows using tools that estimate PageRank distribution across the site. The practical split: writing contextual links in blog posts is on-page. Building a scalable navigation system, fixing redirect chains that dilute link equity, or ensuring your XML sitemap aligns with your internal link graph is technical. Both matter. A perfectly optimized page with great content won't rank if internal links don't pass enough authority to it. Most SEO categorization debates are academic. What matters is execution. If your internal linking strategy accounts for user experience, crawlability, and authority flow, you're doing it right regardless of which bucket you put it in. Just don't ignore it because you think it belongs to someone else's checklist.