Abbreviations
CC and BCC
Carbon copy and blind carbon copy: copying someone into an email. People in CC are visible to everyone; people in BCC are hidden from the other recipients.
You'll hear it as
I'll CC your manager so they're in the loop.
Why it matters to you.
Being CC'd usually means "for information", not "please act". Using BCC to quietly copy someone in can backfire if they reply to all.
Videos.
No video mentions CC and BCC by name yet. These are on the same topic, Communication & speaking.