Brand Authority is the degree to which a brand is recognized by both humans and machines as a credible, trustworthy, and expert source within its domain. In AI Search contexts, it reflects how confidently large language models (LLMs) like ChatGPT, Claude, and Gemini rely on that brand’s content when generating answers or recommendations. Building brand authority involves consistent factual accuracy, verified entity relationships, high-quality structured data, and corroboration across authoritative external sources. The stronger a brand’s authority signal, the more likely it is to be cited, recommended, or prioritized within AI-generated outputs.