Communications skills are extremely important to a supervisor. A supervisor must communicate orally with subordinates. A good supervisor will need to be able to clearly express what needs to be done to subordinates. The supervisor must do this so that workers will know exactly what is expected of them and so that they will be somewhat motivated to perform well.
A supervisor must also communicate in writing, particularly with higher levels of management. Such communications need to be clear so that the management can know exactly what is going on at the "ground level" of the firm. Unclear communications will leave management with a blurry picture of what is going on, thus leaving them less able to continue to steer the firm in the correct direction.