What is digital object identifier used for?

A Digital Object Identifier (DOI) is a unique alphanumeric string assigned to a digital object, such as a journal article, report, or dataset, to provide a permanent link for its identification and access. It facilitates the efficient retrieval of electronic content, ensuring that even if the location of the object changes, the DOI remains constant. DOIs are widely used in academic publishing to enhance citation accuracy and to streamline the discovery of research materials.