The Blind Carbon Copy (BCC) feature allows you to send an email to recipients without showing their email addresses to other recipients. This feature is useful when you want to send an email to multiple people but do not want them to know who else received the email. When you use the BCC feature, each recipient only sees their own email address in the “To” field and does not see who else received the email. This is often used for privacy reasons or to prevent recipients from replying to all recipients by accident, which can lead to email clutter and headaches.