Just like any other email service provider, Gmail also gives you both CC and BCC options.

Usually the To field lists the primary recipients of the email, CC the secondary list and BCC for tertiary list.

Some people say it courtesy copy which totally describe what is the meaning of this field.

With this if you want to send a copy to, you can make use of this field.

The only difference between CC and BCC is that in BCC recipients do not have any idea of each other.

The recipient will know that heshe was in BCC field but the other names in the list will be discrete.

BCC field is used to send the mail secretly to some one, Bccd person will not able to see any of the main recipient or ccd recipients.

Mail will be delivered to all three persons, but here Ranjan is the main recipient and Praveen is the ccd person, so he can see the recipient list including To and BCC field.

Ashish will recieve the mail but he cannot see any recipient (not To nor CCd person).

You will tire if you have to send mails to the same set of people and each time you have type those IDs.

Cc Vs Bcc