Domain Authority is a third-party score — most familiar as Moz's 0–100 metric, with Ahrefs' Domain Rating (DR) a close cousin — that estimates how likely a domain is to rank in classic Google search. It is built mostly from the quantity and quality of a site's backlinks, and it is a proxy, not a Google metric.
For AI visibility it is a weak signal. Because AI engines retrieve and cite at the passage level, weighing relevance, extractable structure, freshness, and corroboration over backlink count, a high Domain Authority does not reliably earn citations and a low one does not prevent them. In Featured's 2026 analysis of 22,881 AI citations, 34.5% came from sites with a Domain Authority under 40 (single-vendor, directional; attribute "Featured, 2026").
Do not confuse it with entity authority, which is how strongly AI associates your brand with a topic. Entity authority — driven by brand mentions, knowledge-graph presence, and topic co-occurrence — is repeatedly found to predict AI citations more than backlinks do, and Ahrefs' 2026 data put branded mentions about three times ahead of raw backlink count for AI Overview presence. The two often rise together, which is why they get muddled, but it is the mentions and topic association doing the work for AI, not the link-based score. Track your per-engine citation share, not your DA number, to know your AI visibility.