Does bcc mean that the mail address wont be displayed

Yes, that's correct! When you use the "Bcc" (Blind Carbon Copy) field in an email, the email addresses you enter in that field will not be visible to the recipients of the email.

When you send an email with a Bcc field, the email addresses in that field will be included in the email headers, but they will not be displayed in the email body or in the "To" or "CC" fields. This means that the recipients of the email will not be able to see the email addresses of the other people who received the same email.

The purpose of Bcc is to allow you to send an email to multiple people without revealing their email addresses to each other. This can be useful in situations where you want to keep the email addresses private, such as when sending a newsletter or announcement to a large group of people.

It's worth noting that some email clients and servers may not support Bcc, or may have limitations on the number of email addresses you can include in a Bcc field. Additionally, some email providers may not allow you to use Bcc at all, so it's always a good idea to check with your email provider before using it.