With the physical borders of conducting business in the world disappearing business personnel are finding that they have a second occupation, which is writing.
With the current economical climate travel is being cut-down to the minimum and instead e-mails, blog and other forms of correspondence are being used.
The thing is that the English language is complex and can be easily misunderstood, thereby causing confusion and misunderstanding.
Therefore one should understand that:
They play an important in communicating ones ideas and thoughts clearly to others