Excellent communication is important for building positive relationships with customers and vendors. Tone of voice and confidence account for 85% of communication, while word content accounts for 15%. Good listening skills are also important, as it allows conversations to stay on track and makes others feel respected. The average speaking rate should be between 125-150 words per minute. A communicator's tone should vary depending on the emotional needs of the other person. Clear, concise communication without repetition is important for appearing confident.