An ORCiD profile allows you to:
All this information is available in one easy to access location.
Scopus Author ID allows information to be analyzed.
Author IDs are created when you publish in any Scopus journals.
Web of Science publications can be grouped together using a unique identifier, the ResearcherID.
Allowing you to create a list of publications
This data can also be analyzed.
When using Google Scholar profiles, be wary of using the Auto Updates option. Use the "Don't automatically update..." option so that e-mail alerts are sent to you to give you the ability to review the publications before adding them to your profile.