CC - Carbon Copy
Carbon Copy abbreviated as CC, a field that you may find along with the "To" field, while composing a mail. There is often a need that comes while writing a mail, when you want to send a copy of mail to a list of mail addresses. So, instead of writing them in "To" field you can mention them in CC, seperated them by a comma (,). The list of mail addresses mentioned in the Cc field will be visible to all the recipients.
Where to used CC
You may mention the list of addresses in CC block, when you want to send the carbon copy of the mail to all the mail addresses. Along with that you want to show the details of all the mail addresses mentioned in To and Cc field. If you don't want the recipient to know the details of other mail addresses, then you may go for Bcc (Blind Carbon Copy).