Becoming an effective communicator

Being an :
Why is it important for a manager to be an effective communicator?
Can a manager be effective if they are not a ? Explain.
Have you ever experienced this in your own job? Explain.
:
What kind of impact can have on an organization?
Share any examples of how the “grapevine” affected your own workplace.
What can managers do to limit the of grapevine communication on the organization?