What are the five key elements of effective communication in personal and business?

Five key elements of effective communication are; purpose, tone, audience, content, and style. Purpose is sel f explanatory, why the message is being sent. Tone reflects negative, positive, or informative content, and should reflect the audience. Audience means know who the message is for, friend or business. Content is what the message is about and should also reflect the audience, e.g. if speaking before a group of astronomers one would not have to explain lightyears, but could do so for a group of fifth graders. Style, again reflects the audience, professional looking for a business setting with light colored backgrounds (if visual aids are being used).