Backlink
A link from another website to yours — one of the strongest signals that your site is trustworthy.
A backlink is simply a link from someone else's website pointing to yours. Search engines treat these like recommendations: when reputable, relevant sites link to you, it signals that your content is trustworthy and worth showing to searchers. It's one of the oldest and most important factors in how sites rank.
Not all backlinks are equal. A link from a respected industry publication carries far more weight than dozens from spammy, low-quality sites — and paying for junk links can actually hurt you. The durable way to earn them is to publish things worth citing and to build genuine relationships: press coverage, partnerships, guest articles, and getting listed where your industry looks.
Why it matters
Earning links from respected sites is one of the surest ways to climb search rankings and get discovered by new customers.