If your work has been previously harvested by Elements from Scopus (or, if you have connected ORCiD with Elements and ORCiD is also connected with Scopus), Elements will already have your ID waiting for you to claim with one click.
Authors with works indexed in Scopus are automatically assigned a Scopus Author Identifier. This is generated via an algorithm so it is possible you may have more than one Scopus ID e.g. if you have been affiliated with multiple institutions.
Authors can ask Scopus to merge any duplicate profiles to ensure all papers authored by you (indexed in Scopus) are captured under the same profile ensuring improved attribution and better citation tracking. This can be done within Scopus itself when searching for your name or via ORCiD when connecting Scopus to your ORCiD ID or via Elements.
If you see more than one ID showing in Elements click the ID links to check they are yours before accepting. You can also request to merge IDs at this point and emails from Scopus will follow to confirm this:
See this short ID merging video:
Adding your Scopus ID to Elements ensures your published works indexed by Scopus automatically feed into Elements joining up the ORCiD/Elements/Scopus triangle to ensure a cleaner data flow. If a Scopus ID is not added, Elements will continue to search Scopus for your works via a name search and add records it thinks are yours into 'Pending'. Some of these records might not belong to you requiring you to check and delete from 'Pending'.
Adding your Scopus ID ensures any records from Scopus are claimed automatically, cutting out the 'Pending' stage and reducing the manual burden for authors.