Presentations skills and public speaking skills are very useful in many aspects of work and life. Effective presentations and public speaking skills are important in business, sales and selling, training, teaching, lecturing, and generally feeling comfortable speaking to a group of people.
Developing the confidence and capability to give good presentations, and to stand up in front of an audience and speak well, are also extremely helpful competencies for self-development and social situations.
Presentation skills and public speaking abilities are not limited to certain special people - anyone can give a good presentation, or perform public speaking to a professional and impressive standard. Like most specialisms, this requires preparation and practise.