The purpose of communication is to get your message across to others clearly and unambiguously.
Doing this involves effort from both the sender of the message and the receiver. And it's a process that can be fraught with error, with messages often misinterpreted by the recipient. When this isn't detected, it can cause tremendous confusion, wasted effort and missed opportunity.
In fact, communication is only successful when both the sender and the receiver understand the same information as a result of the communication.
By successfully getting your message across, you convey your thoughts and ideas effectively. When not successful, the thoughts and ideas that you convey do not necessarily reflect your own, causing a communications breakdown and creating roadblocks that stand in the way of your goals – both personally and professionally.