Difference between CC and BCC in a mail

How to mail your friends or business people in a correct way?

You have 3 different ways to send a mail, the only thing for you to do is pick the wright one.

Below we describe the 3 possibility's to send a mail.

To:
Displays all the recipients you want to send an e-mail to.

CC: Carbon Copy
To inform another person that you sent an e-mail to someone. This is visible to the people in the Sharing is sexy