An ORCID identifier (ORCID iD) is a unique, personal, persistent identifier for researchers that distinguishes you from every other researcher and enables you to link your publications to your unique record, ensuring your work is recognized.
Getting an ORCID iD is free and easy to do through the ORCID registration page: orcid.org/register
ORCID is an international, interdisciplinary, open, and not-for-profit organization created in 2010 for the benefit of a range of stakeholders, including researchers, research organizations, research funders, and publishers. Springer and Nature Publishing Group were amongst the founders of ORCID.