Think of Apple, Amazon, Microsoft, Google, Facebook, Twitter, LinkedIn, Xing and many more. This requires some configuration steps for a developer to connect each Identity Provider with the Identity Platform.
Once completed, your audience will be able to connect using the social connection (or be automatically authenticated if logged in on any of the drivers if applicable).
For the last few years IQVIA scanned and mapped a large portion of the Healthcare Professionals correctly. It's very likely that for example LinkedIn profiles can be identified in a matter of seconds.