Internal linking means creating hyperlinks that point from one page on your domain to another page on the same domain. Unlike external links that send visitors to other websites, internal links keep users within your site while helping search engines map your content architecture. The practice serves three core functions. First, it distributes PageRank (link equity) throughout your site, strengthening pages that might otherwise sit isolated with no inbound links. Second, it establishes topical relationships and content hierarchy—linking from a pillar page about SEO to supporting articles about meta tags or schema markup signals to Google how these pieces connect. Third, it creates pathways for both users and crawlers to discover content that might be buried several clicks deep in your structure. Effective internal linking follows some basic principles. Your most important pages should receive more internal links from relevant context, not just from navigation menus. Anchor text should be descriptive and natural—"on-page SEO factors" works better than "click here" because it tells Google what the destination page covers. For a 500+ domain portfolio like ours at Ottawa SEO, we track internal link counts per page and ensure no orphaned pages exist without at least one contextual internal link. Common mistakes include overlinking (stuffing 15 internal links into a 400-word post looks manipulative), linking exclusively from footers or sidebars instead of body content, and using the same anchor text repeatedly for one target page across dozens of sources. A natural internal linking profile varies anchor text, links from contextually relevant pages, and balances navigational convenience with SEO value. For most sites, auditing internal links quarterly catches broken links, identifies orphaned pages, and reveals opportunities to boost underperforming content by adding strategic links from high-authority pages. Tools like Screaming Frog or Ahrefs Site Audit map your internal link graph and show exactly where link equity flows.