Difference between CC and BCC:-
"CC" means "carbon copy" and dates from that ancient period in human history where pieces of carbon paper were inserted between two sheets of typing paper. It just means you are sending a copy of the original to more than one person. Everyone who gets a copy sees who else has gotten the copy.CC is carbon copy and is exactly the same as TO. The only difference is the "status" of the message. CC indicates that you are getting a copy but are not the primary addressee.
For example use TO for a company and CC for the Better Business Bureau when sending a complaint to a company.

"BCC" stands for "blind carbon copy" and simply means that while you are sending copies of the original to more than one person; ONLY the address in the "To:" section is visible to the other receipients of the message. This is good for when you don't want the "To:" person to know that others are receiving copies of your message to them.
BCC is blind carbon copy and is hidden. It is used to send out a mailing without everyone knowing the other addresses.
When you use CC or BCC you must also have a TO address. With BCC you usually put yourself in the FROM and TO.