Domain authority remains one of the heaviest weights the engines apply, even in retrieval-first architectures. A new domain – a startup site, a recently-launched brand, an executive’s personal site – struggles to be cited by AI engines until external authority signals accumulate: inbound links from authoritative sources, citation in mainstream press, structured entity links to Wikidata and Wikipedia, sustained content depth on the relevant topics. The practical implication is that owned-property work has to be paired with external authority work; publishing into a low-authority domain in volume produces little AI engagement on its own. We sequence accordingly on engagements: build the entity infrastructure first, secure the authoritative third-party coverage that establishes signal, then drive owned-content production into a footprint that the engines will actually weight.