ORCID stands for Online Research Contributor iD. ORCID is a freely available tool for researchers, scholars, authors, etc.
When researchers sign up for an ORCID ID, they receive their own unique identifier that helps to distinguish them from other scholars, especially those with similar names. It has become an essential tool for researchers, and is highly recommended and often required when you apply for grants or awards, engage in any type of publishing, or present papers at conferences.
NIH, AHRQ, and CDC announced in July, 2019 that individuals supported by research training, fellowship, research education, and career development awards will be required to have ORCIDs beginning in FY20, (See details: Notice Number NOT-OD-19-109) and more funding organizations are expected to follow suit.
Uses and benefits: