The sameAs property is a field in structured data that links your site's representation of an entity to the same entity elsewhere on the web, such as your LinkedIn page, Wikipedia article, Wikidata item, Crunchbase profile, or official social accounts. It tells machines that all these references are the same brand.
For brands, sameAs links are a practical way to strengthen entity recognition. By explicitly connecting your homepage to your authoritative profiles, you help search and AI systems consolidate scattered references into one confident understanding of who you are. It is a small, durable piece of entity work, usually placed inside Organization schema on the homepage.