Q: What does 'primary cc e-mail address' refer to in journal communication?

The primary cc e-mail address is the email address that you will primarily use for communication with the journal. The journal will use this address to send you e-mails. For researchers, it is generally their institutional e-mail address. However, these days some researchers use alternative e-mail addressees such as a Gmail address instead of their institutional e-mail. However, if you are using your non-institutional address, make sure that this is the address mentioned in your website and is one that you use for other professional purposes.