What we mean is the importance of good presentations. What does a good presentation do? It communicates the message in an interesting, succinct and clear way. People do judge a book by its cover, so the best thing to do is to write a good book and design a good cover for it.
Importance to the company/organization
Good presentations improve communications within the company, which improves morale and reduces stress.
Miscommunication is very expensive for a company and misunderstandings waste time.
Good presentations clarify company policy.
Improve the chances of selling the product or idea you are trying to sell. Like it or not, organizations are judged on their presentations.
Importance to the individual within the organization
Sign of leadership, therefore more likely to be promoted. Over the centuries great leaders have been known for the great speeches they have given (Julius Caesar, Winston Churchill, Martin Luther King, Steve Jobs etc). These are, in effect, presentations.
You will get your point of view/idea across more successfully.
If you can deliver good presentations you will be more efficient at your job.
Learning the principles and techniques of presentations allows you to improve at other areas of communication, for example job interviews or loan applications.