While hard work and good ideas are needed to achieve success, one's ability to express those ideas and to get others to join them is just as important. A lot of this verbal expression will be either individualistic, or in small groups, but there will be instances (and for some individuals) when one will be involved in more formal and public speaking in front of larger numbers.
If this very thought of making oral presentations and delivering them in front of a large group, makes one feel nervous, then the good news is that there are many more sailing in the same boat. Many presenters lack the skills and confidence to make effective presentations. One knows the topic and the ideas were all noted, maybe even documented; yet the presentation didn't go well, enough.
Was it the way the speech was delivered? Or, the audience didn't seem interested?
Basically, one needs to understand the need of an oral presentation. Understanding this will help one deliver with more confidence.
A Presentation is a fast and effective method to get things done via other people. Presentations are essentially used as a formal method, in managing any project. It brings the team together to plan, monitor and review its progress.
What is it that a presentation does?
It puts one on display in front of those who are there to absorb the presentation. The employer needs to see an evidence of one's planning and leadership skills, so that they are confident in one's position as their manager. This will also provide one with an opportunity to inspire and motivate the team members to undertake the tasks, which are being presented.
It gives one the authority to ask questions, as well as initiate discussion. It may not be suitable to hold a discussion during the presentation itself, but it does allow you to raise the issues, present the problems and at least to establish who amongst the audience could provide valuable input to the decision-making.
Presentations are an opportunity to speak one's mind, to show one's stuff and tell the people what the world is really like. The audience one addresses is bound by good etiquette and grooming to sit still and watch.
Communication skills are very important to master oral presentation skills. Check out some more resources on essays and optical illusions.