A third-party score that estimates how well a whole domain might rank, based largely on its backlink profile.
ID
SS-DF-123
Confidence
Established · 82
Evidence
Established
Updated
2026-07-08
Definition
A third-party score that estimates how well a whole domain might rank, based largely on its backlink profile.
Domain Authority is a proprietary score produced by SEO tool vendors such as Moz, Ahrefs and Semrush to approximate a site's overall link strength on a comparative scale. It is not a Google ranking factor and search engines do not use it; it is a useful directional benchmark for comparing sites and tracking link-building progress. Treat it as an estimate rather than ground truth, and never optimise for the metric itself at the expense of genuine relevance and trust.