That said, it’s worth putting in the time to stay on top of proper email etiquette and knowing what does CC and BCC mean. It really could have an impact on your career and how you’re perceived by colleagues and clients. You probably CC people on just about every work email you send. And there’s always those frustrating people who consistently CC just about everyone in the office. Sometimes it’s a not-so-subtle way of letting everyone know how much work they’re doing; sometimes it’s a subtle way to intimidate or back-handedly tattle on their intended recipient; sometimes they’re just innocently trying to keep everyone in the loop.