Internal links matter for SEO because they solve three fundamental problems: discovery, authority distribution, and user navigation. When Google crawls your site, it follows internal links to find new pages. A page buried five clicks deep with no internal links pointing to it might never get indexed, even if it's technically accessible. Every internal link you add creates a pathway for both crawlers and PageRank to flow. PageRank distribution is the mechanical reason internal links work. When you link from a high-authority page (like your homepage or a page with strong backlinks) to a deeper page, you're passing some of that authority along. This is why strategic internal linking from cornerstone content to supporting pages can lift rankings for target keywords. At Ottawa SEO, we typically see pages gain 2-8 positions in SERPs within 4-6 weeks just from adding 3-5 contextual internal links from related high-authority pages. Internal links also establish topical relevance and site architecture. When you link using descriptive anchor text like "Ottawa local SEO services" instead of "click here", you're telling Google what the destination page is about. Consistent internal linking patterns create topic clusters that signal expertise in specific areas. A pillar page about on-page SEO that links to 8-12 supporting articles creates a clear content hub. The user experience benefit is equally important. Internal links reduce bounce rate by offering relevant next steps. Someone reading about title tags might want to learn about meta descriptions next. That extended session sends positive engagement signals. Common mistakes include overlinking (stuffing 20+ links in a 500-word post), using generic anchor text repeatedly, or linking randomly without topical relevance. We aim for 2-5 contextual internal links per 1,000 words, placed where they genuinely help the reader. The best internal linking strategy isn't about hitting a quota; it's about creating a logical web of content that serves both search engines and humans.