sameAs is a Schema.org property used to point from an entity to another URL that unambiguously represents the same entity.
What sameAs means
The property expresses identity, not a general related-link field. It is commonly used in Organization or Person markup for official profiles, knowledge-base entries or authoritative identifiers. Each target should be controlled, current and genuinely about the same entity.
Decision rule and evidence
Add sameAs only when the page’s entity and the target identity are clear. Prefer a small maintained set of official destinations over an exhaustive list of social profiles, directories and loosely related pages.
Practical workflow
- Identify the entity described by the structured-data node.
- List its official public profiles and stable identifiers.
- Check that each URL resolves, represents the same entity and is appropriate for public disclosure.
- Add the links to the relevant schema node while keeping visible page facts consistent.
- Validate the generated graph and recheck after a rebrand or profile migration.
Verification and common mistakes
Inspect the rendered JSON-LD and the target pages. A schema validator can confirm syntax, but it cannot prove identity or make a rich result appear.