Everything said about the importance of effective communication is especially true in business. There is a world of difference in the outcome between giving a talk to model car hobbyists and the initial sales presentation to try to land a contract to build a $200 million manufacturing plant. Business settings also require more sales skills for public speaking, more need to speak impromptu, and presentations that need to be delivered by phone, video, or over the Web. You will definitely advance your career if you have the ability to speak articulately in public.