Backlink

Definition

A backlink (also called an inbound link or external link) is a hyperlink from one domain pointing to a page on a different domain. Google's original PageRank algorithm treated each backlink as a vote of confidence — the more votes, and the more authoritative the voters, the higher the receiving page ranked. Modern ranking algorithms weight link quality heavily over quantity: a single link from a high-authority, relevant source outweighs hundreds of links from low-quality or unrelated sites.

Why it matters for SEO

Backlinks remain one of the strongest ranking signals. Sites with stronger backlink profiles consistently outperform those without in competitive SERPs, all else being equal. Quality indicators that matter most: the linking domain's authority, the topical relevance of the linking page, the anchor text used, and whether the link is `follow` (passes link equity) or `nofollow` (signals the link is unendorsed). Building backlinks is the primary off-page SEO activity.

How DeepSEOAnalysis checks this

DeepSEOAnalysis does not crawl third-party backlink databases — that requires a dedicated tool like Ahrefs, Semrush, or Moz. The audit does check your outbound links (links from your site to others) for broken links and nofollow usage, and analyzes your internal link structure as a proxy for how authority flows within the site. For external backlink analysis, use a dedicated link-intelligence tool.

Useful tools and resources

• What we check instead