The degree to which AI models treat a brand as a primary source for its category.
Brand authority is the compound-interest metric of GEO. Sites that are consistently cited become more citable — models see their presence in other pages' citations and reinforce the association.
Building authority takes named experts, primary research (even small), and sustained publishing in a narrow lane. Breadth dilutes; depth compounds.
Experience, Expertise, Authoritativeness, Trustworthiness — Google's content-quality heuristic, also used by AI retrievers.
The percentage of AI responses about a topic that link to or name-check a specific source.
The percentage of relevant AI answers in your category that cite or mention your brand.