A vCard, not a hosted profile
A contact QR stores the details directly in the code. It does not create a public ScanAtlas profile page, track who saved the contact, or keep an address book synchronized. The scanning device decides how to preview and save the vCard.
Choose static details or a website link
Use a vCard QR when you want contact details available from the symbol itself. If your role or details change frequently, a website QR pointing to a profile page you control may be more practical: the page can change without reprinting the URL.
Make the printed card useful without scanning
Print your name and a preferred contact method beside the QR. A recipient should still be able to identify you if their camera is unavailable. For a team batch, keep a consistent template and verify each person’s encoded details.