Public speaking is a soft skill that requires excellent communication skills, enthusiasm, and the ability to engage with an audience. Soft skills are interpersonal skills that are less technical and more about how you interact with people.
Public speakers make presentations to a group. Presentations could range from speaking to a small number of employees to presenting to a large audience at a national conference or event. The same skill set and ability to be comfortable speaking in public are required regardless of the size of the group.