Imagine you are speaking to a colleague at work. Which do you think would be a better way to ask for some help: Tom, could you give me a hand, please? or Mr. Ackerman, could I trouble you to help me for a moment? The choice between these two is a choice in register which is vital to good workplace communications.
In English, register is a key element in expressing degrees of formality. This article focuses on workplace communications and correct register use and gives examples for various situations.
Here are two quizzes on workplace communications and register use: