The sameAs property is a schema.org attribute that asserts two URLs refer to the same real-world entity, allowing structured data on a page to link an organisation, person, or place to its authoritative profiles elsewhere on the web. Common targets include Wikipedia or Wikidata entries, official social media profiles (Twitter/X, LinkedIn, Facebook, Instagram), and entries in curated authority databases such as VIAF for people or Companies House for UK businesses. Google uses sameAs values to disambiguate entities during Knowledge Graph construction, consolidating signals from multiple sources under a single entity node. A well-populated sameAs set — covering a Wikidata QID and major social profiles — significantly increases the likelihood that Google will generate or enrich a knowledge panel. The property can be used inside Organization, Person, Place, and many other schema.org types. Linking to pages that are themselves well-linked and regularly crawled gives the disambiguation signal more weight.