ORCID is an open, non-profit, publisher-agnostic community-based effort to provide a registry of unique researcher identifiers as well as a transparent method of linking research activities and outputs to these identifiers. ORCID, which stands for "open researcher and contributor identifier",is unique in its ability to reach across disciplines, research sectors, and national boundaries and its cooperation with other identifier systems.
An ORCID iD (Open Researcher and Contributor ID) gives you a way to reliably, unambiguously and permanently connect your names(s) with your work throughout your research career, including publications, grants, education, employment and other biographical information, etc.
This can be helpful in a number of ways as it:
Provides a means to distinguish you from other authors with identical or similar names.
Links together your body of work, especially if you have had or used different names during the course of your career.
Makes it easy for others including potential collaborators, funders, prospective employers, conference organizers, publishers to easily find your research output.
Ensures that your work is clearly attributed to you.