What are backlinks and how do they work?

What are backlinks and how do they work?Backlinks are hyperlinks from one website to another, and they work as votes of confidence that signal to search engines like Google that your content is valuable and trustworthy. The more high-quality backlinks you earn from authoritative sites, the higher your pages typically rank in search results.AnswerBacklinks are incoming links from external websites pointing to your domain. When Site A links to Site B, that's a backlink for Site B. Google's original PageRank algorithm treated these links as endorsements—the logic being that if reputable sites link to you, your content probably deserves to rank.Search engines use backlinks as one of their strongest ranking signals because links are harder to fake than on-page content. A pharmaceutical site with 500 backlinks from medical journals and university research pages will outrank a competitor blog with 5,000 links from random directories and comment spam. Quality beats quantity every time.Not all backlinks carry equal weight. Google evaluates the linking page's authority, topical relevance, and link placement. A contextual link from a Toronto Star article about local business carries more power than a footer link from an unrelated hobby forum. The anchor text matters too—descriptive anchor text helps Google understand what your page is about, though over-optimized exact-match anchors can trigger penalties.Backlinks also pass what SEOs call "link equity" or "link juice" through your site architecture. When an authoritative page links to your homepage, your homepage can distribute some of that authority to internal pages through your own internal linking structure. That's why sites with strong backlink profiles often rank well across multiple pages, not just one.At Ottawa SEO, we've seen clients jump from page three to page one within 90 days after earning 8-12 relevant backlinks from industry publications and local business associations. We focus on editorial links—ones earned through genuine content value, not purchased or exchanged. The challenge is that building quality backlinks takes time. You need linkable assets: original research, tools, comprehensive guides, or newsworthy content that journalists and bloggers want to reference.The biggest mistake is chasing volume through low-quality link schemes. Google's algorithms now detect and devalue spammy link patterns, and manual penalties can tank your rankings overnight. Build backlinks like you're building professional relationships—slowly, strategically, and with real value behind every connection.