ORCID, which stands for Open Researcher and Contributor ID, is a free, unique, persistent identifier for individuals to use as they engage in research, scholarship, and innovation activities. (Referenced by both Scopus and Google Scholar.)
A Scopus ID is automatically generated if you have a paper in the database: if so, registration is not required. If you need to add a Scopus Author ID, you can create an account (be sure to sign up for an ORCID first) by following these easy steps.
An easy way for authors to showcase their academic publications. Check who is citing your articles, graph citations over time, compute several citation metrics and make your profile public, so that it may appear in Google Scholar results.