ORCID, which stands for Open Researcher and Contributor ID, is a non-profit organisation supported by a global community of member organisations in the research ecosystem. You can search for a researcher's ORCID and there is a list of current ORCID institutional members available.
ORCID provides you with a persistent digital identifier (a sixteen-digit number) that distinguishes you from every other researcher and allows you to bring together all of your research outputs and contributions. It also allows publishers, funders, and other organisations to confirm your identity and improve their workflows.
Your ORCID belongs to you and not to the organisation or institution that you work with. This allows you to continue using your iD throughout your research career, even if you change institutions, or if you change your name.
Use your unique iD, when prompted, in systems and platforms to ensure you get credit for your contributions. An ORCID will also help towards funding applications, with more research funders requesting an ORCID as part of the application process.