How it works: A new study from Growth Memo’s Kevin Indig across 50,000+ brands found that AI search tools do not evaluate authority through aggregate domain metrics alone. Instead, AI models rely heavily on complete, topic-focused content clusters on-site, supported by consistent third-party entity mentions across external sites, publications, and web discussions.
What’s the benefit: For Digital PR, this reinforces that targeted brand coverage, thought leadership, and expert commentary matter far more than acquiring generic, high-volume links. Securing mentions on relevant third-party sites helps build the external consensus AI models need to recognise a brand as a subject matter expert, increasing the likelihood of being cited in direct AI search responses and shortlists. Topical authority really matters in AI search, and the reason is longevity. This study shows AI answers develop topic owners and once a brand earns an outsized share of mentions in a category, it usually keeps it.
