Backlinks are hyperlinks on external websites that point to pages on your site. When Site A links to Site B, that's a backlink for Site B. Search engines, especially Google, treat backlinks as editorial votes—if reputable sites link to you, your content is probably valuable and trustworthy. Google's original PageRank algorithm was built on this premise, and while the ranking system has evolved dramatically since 1998, backlinks remain one of the top three ranking factors. A 2023 analysis of 11.8 million search results found that the number of referring domains correlates more strongly with rankings than almost any other metric. Sites in position one typically have 3.8 times more backlinks than positions two through ten. Backlinks matter for three core reasons. First, they directly influence rankings—pages with zero backlinks rarely rank for competitive terms, while those with dozens of quality links from relevant sites often dominate page one. Second, they drive referral traffic—a link from a high-traffic industry blog or news site can send hundreds of qualified visitors. Third, they speed up indexing—Google's crawlers discover new pages by following links, so more backlinks mean faster discovery and indexing of your content. Not all backlinks carry equal weight. A link from the Globe and Mail or a .edu domain in your niche is worth exponentially more than ten links from low-authority directories. Google evaluates the linking site's authority, relevance to your topic, the anchor text used, and whether the link is followed or nofollowed. A single contextual link from a DR70+ site in your industry can move the needle more than fifty spammy forum signatures. At Ottawa SEO Inc., we've seen clients jump from page three to page one within 90 days after acquiring 8–12 high-relevance backlinks, while others with hundreds of low-quality links stagnate or get penalized. Quality beats quantity every time. Building backlinks through genuine relationships, creating linkable assets like original research or tools, and earning editorial mentions remains the most sustainable approach in 2024.