Learn how to manage your ORCID profile as it relates to Scopus at: https://www.elsevier.com/solutions/scopus/support/authorprofile
"The easiest way to manage your profile is through the Scopus to ORCID wizard: http://orcid.scopusfeedback.com/. Follow the steps in this wizard to create a single profile containing all of your publications and to ensure your corrections are sent to Scopus. If you choose to create an ORCID ID (or link your existing ORCID ID with your Scopus author identifier), you’ll see a link to that ORCID ID on your Scopus author details page."
Not sure why you need an ORCID iD? This video tells you what ORCID is all about.