Internal links are clickable connections between pages on your own website. Unlike external links that point to other domains, internal links keep users and search engine crawlers within your site's ecosystem. From an SEO perspective, internal links serve three critical functions. First, they distribute link equity (PageRank) throughout your domain. A homepage with strong external backlinks can pass authority to deeper pages through strategic internal linking. Second, they create a crawlable architecture that helps Google discover pages efficiently. Without internal links, orphaned pages essentially don't exist to search engines. Third, they signal topical relationships and content hierarchy through anchor text and link placement. The mechanics matter more than most sites realize. A navigation link from your header passes less focused authority than a contextual link embedded in relevant body content. Anchor text should be descriptive but natural—over-optimization with exact-match commercial keywords in every internal link looks manipulative. We typically see the best results when internal links use varied, semantically related phrases. Common internal linking patterns include: - Hub-and-spoke models where pillar pages link to related cluster content - Contextual cross-references between related blog posts or service pages - Breadcrumb navigation for hierarchical sites - Footer and sidebar links for template-level distribution - Strategic deep links from high-authority pages to conversion-focused pages At Ottawa SEO, we audit internal link distribution as part of technical SEO. A typical portfolio site might have 80% of link equity concentrated in the top navigation and homepage, leaving money pages starved for authority. Rebalancing that through content-driven internal links often produces ranking improvements within 3-8 weeks without building a single external backlink. The biggest mistake is treating internal linking as an afterthought. Adding 4-6 contextual internal links per long-form page, pointed at pages you actually want to rank, compounds authority distribution across hundreds of pages. It's foundational infrastructure, not optional optimization.