Effective speaking skills are a primary foundation for success in business presentations and negotiations, as they enable the delivery of persuasive ideas, build trust, and achieve optimal results. Empirical research from various journals shows that public speaking training significantly improves professional performance, with confidence increases of up to 70% among participants. This paper presents an in-depth literature-based analysis, including a synthesis methodology, quantitateve findings, and practical recommendations for the Indonesian business context.
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