The sameAs property, available on every Schema.org Thing, takes one or more URLs that identify the same entity elsewhere on the web. For an organization these are typically official social profiles, a Wikipedia or Wikidata entry and directory listings. For a person they are professional profiles and author pages on other sites. It helps search engines connect your markup to what they already know about the entity.
What belongs in sameAs
Each URL should be a page about the entity itself, controlled by or clearly describing it. Profiles on LinkedIn, X, GitHub, Crunchbase, Wikidata and Wikipedia are common choices for companies. For authors, a personal site, a professional profile and pages on publications they write for are typical.
Google's Organization documentation lists sameAs as a recommended property. Google has not said how much weight it gives individual links, so the goal is accuracy and consistency rather than volume.
"sameAs": [
"https://www.linkedin.com/company/vellumcrest",
"https://github.com/vellumcrest",
"https://www.wikidata.org/wiki/Q00000000"
]Why it matters for entities
Search engines and AI systems resolve names to entities. A company called Vellumcrest may share its name with a band or a town. Links to profiles that describe the same company reduce ambiguity, and they connect your site to sources that knowledge graphs already use.
Example
Cleaning up after a rebrand
After renaming from Pinefold to Vellumcrest, a SaaS company updates its Organization markup: new name, alternateName set to the old brand, and sameAs pointing to the renamed social profiles and the updated Wikidata item. It removes links to profiles that were abandoned rather than renamed.
Common mistakes
Linking to pages that mention you
A news article about the company is not the same entity. sameAs is for profiles and reference pages that identify it.
Listing dead or unofficial profiles
Abandoned accounts and fan pages add noise. Keep the list short and current.
Questions
No. Only link to pages that exist and describe the entity. A Wikidata item, where one exists, can be a useful reference instead.
