What does mean in mail

In the context of email, "CC" stands for "Carbon Copy". It's a way to send a copy of an email to additional recipients, usually people who are not the primary recipient of the email, but who may be interested in the content or need to be informed about the conversation.

When you CC someone, they will receive a copy of the email, but they will not be able to respond to the email directly. The primary recipient (the person you are sending the email to) will still be able to respond to the email.

Here's an example:

Let's say John is sending an email to his manager, Jane, about a project update. John also wants to keep his colleague, Mike, informed about the project, so he adds Mike's email address in the CC field. When John sends the email, Jane will receive the original email, and Mike will receive a copy of the email.

CC is often used for:

In contrast, "BCC" (Blind Carbon Copy) is used to send an email to additional recipients without including their email addresses in the "To" or "CC" fields. This is often used for sending mass emails or newsletters, where you don't want the recipients to see each other's email addresses.