Backlink

A backlink (or inbound link) is a hyperlink from another website pointing to yours. Backlinks are the primary driver of domain authority: search engines treat each one as a vote of confidence, so a domain that earns many high-quality links tends to rank better on a SERP. Not all links carry equal weight — a single link from a high-traffic, topically relevant news outlet can outweigh hundreds from obscure directories — and the anchor text of a link signals to search engines what the destination is about. Because a strong backlink profile accrues over years, an aged domain that already has one can command a significant aftermarket premium.