Author level metrics provide a measure of impact of one particular author. Most author level metrics incorporate citation counts of articles written.
Author identifiers, such as ORCIDs, give you a way to reliably and unambiguously connect your names(s) with your work throughout your career, including your papers, data, biographical information, etc. This can be helpful in a number of ways:
(International Standard Name Identifier)
|From ISNI International Agency; ISO (International Organization for Standardization) certified||ISNI gets data from many sources. Search existing IDs on the search page. Apply for an ISNI.|
|From Elsevier||Identifier automatically assigned to all authors indexed in Scopus|