The schema.org property that asserts ‘this entity representation and that entity representation refer to the same real-world entity’ — the linking mechanism that enables cross-platform entity coherence. SameAs bindings connect your website’s schema to your Wikidata item, LinkedIn profile, Crunchbase page, and other authoritative entity representations. Each sameAs link is a corroboration signal. Comprehensive sameAs linking is required for entity resolution systems to confidently merge signals from multiple sources into a unified entity understanding. Missing sameAs links fragment your entity signal and reduce confidence.