Backlink
A backlink is a hyperlink from one website that points to a page on another website, signaling trust, authority, and topical relevance to search engines — one of the most important ranking factors in SEO.
Backlinks — also called inbound links or incoming links — are the foundation of off-page SEO. When a website links to another, it is effectively endorsing that site's content. Search engines like Google interpret backlinks as votes of confidence: the more high-quality, relevant sites that link to a page, the more likely that page is to rank well for competitive search terms.
Types of Backlinks
- Do-follow — passes link equity (also called "link juice") from the referring domain to the target page
- No-follow — carries a
rel="nofollow"attribute; Google now treats it as a hint rather than a directive - Sponsored —
rel="sponsored"tag required for paid placements; does not pass ranking signals - UGC (User Generated Content) —
rel="ugc"for links in comments, forums, or community posts
What Makes a Backlink Valuable
Not all backlinks are equal. A backlink from an authoritative, relevant publication carries significantly more weight than a link from a low-traffic directory. Key quality signals include: domain authority of the referring site; topical relevance between the referring content and the target page; editorial context (is the link naturally placed, or forced?); and whether the link is genuinely earned or commercially acquired.
Backlinks and Google's Quality Policies
Google's Webmaster Guidelines prohibit manipulative link schemes — including buying links, excessive link exchanges, and placements on sites that exist primarily to sell link equity. The 2024 Site Reputation Abuse policy explicitly targeted publishers hosting third-party content for SEO manipulation. Backlinks that comply with Google's policies are editorially placed, reflecting genuine endorsement.
Related Terms
Anchor Text
Anchor text is the visible, clickable text in a hyperlink — a key SEO signal that tells search engines what a linked page is about, influencing how it is indexed and ranked for relevant queries.
Do-Follow Link
A do-follow link is a standard hyperlink that passes link equity from the referring website to the linked page, contributing to the target site's domain authority and search engine rankings.
Domain Authority
Domain Authority (DA) is a third-party metric developed by Moz that predicts how likely a website is to rank in search results, scored 1–100 based on the quality and quantity of its backlink profile.
Link Building
Link building is the process of acquiring hyperlinks from external websites that point back to your own, with the goal of improving domain authority, search engine rankings, and organic traffic.
Link Juice
Link juice is an informal SEO term for the ranking value passed from one page to another through a hyperlink — formally referred to as link equity — which contributes to a target page's domain authority and ranking potential.
Referring Domain
A referring domain is a unique website that contains at least one hyperlink pointing to a target website — one of the most important metrics in link building and domain authority assessment.
Backlink Profile
A backlink profile is the complete collection of all external hyperlinks pointing to a website — including number, quality, relevance, anchor text distribution, and domain diversity — used as a key indicator of SEO health and authority.
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