Backlink
A backlink is a hyperlink on an external website that points to a page on your site. Backlinks serve as one of the foundational ranking signals in Google's algorithm, operating on the principle that a link from another site represents a vote of confidence in the linked content. Not all backlinks carry equal weight — links from authoritative, topically relevant domains pass significantly more ranking influence than links from low-quality or unrelated sources.
Backlinks are evaluated by both their source quality and the anchor text used. A backlink profile with diverse, naturally earned links from reputable domains is a strong positive signal, while an unnatural profile dominated by low-quality or manipulative links can trigger manual penalties or algorithmic devaluation. Building a strong backlink profile is the primary objective of off-page SEO.
Why it matters for SEO
Despite decades of algorithm updates, backlinks remain one of the top two or three ranking factors in Google's algorithm. A page with strong backlinks from authoritative domains will consistently outrank thinner or less-linked competitors, all else being equal.
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