Backlinks are incoming links from external domains to your website. In off-page SEO, they function as endorsements—Google interprets each quality backlink as a signal that your content is credible, useful, or authoritative enough for another site to reference. The algorithm treats backlinks similarly to academic citations: more links from respected sources generally mean higher rankings. Not all backlinks carry equal weight. A link from a government site (.gc.ca in Canada), a major news outlet like CBC or The Globe and Mail, or an established industry publication passes far more authority than a link from a new blog with no traffic. Google evaluates the linking domain's own authority, relevance to your topic, and whether the link appears in actual editorial content versus a footer or sidebar. The anchor text—the clickable words in the link—matters too. Exact-match anchors (like "Ottawa SEO services" linking to an SEO agency) can boost rankings for that phrase, but overuse triggers spam filters. A natural backlink profile mixes branded anchors, URL anchors, and generic phrases like "click here." Backlinks differ fundamentally from on-page SEO, which involves elements you control directly: title tags, content quality, site speed, internal linking. Off-page SEO means building your reputation outside your own domain, and backlinks are 70–80% of that effort. The other components include brand mentions without links, social signals, and local citations for businesses with physical locations. At Ottawa SEO, we've built links for clients across 500+ domains since 2014. The pattern holds: clients who earn 5–10 quality backlinks per month from relevant Canadian or industry sites see measurable ranking improvements within 8–12 weeks. Buying links from sketchy brokers or spamming directories does the opposite—it risks manual penalties that can take six months to recover from. The goal is always editorial links that you'd be proud to show Google in a manual review.