ORCID is an independent organization that maintains a registry of unique identifiers, called ORCID iDs, for researchers and scholars. When you use your ORCID iD in a grant proposal, a publication submission etc., it can be easily associated with you. When you move from one employer to another, the history of your scholarly outputs persists in ORCID with no manual re-work.
For an example of an ORCID iD and the associated record, see:
Josiah Carberry orcid.org/0000-0002-1825-0097