Having the power to produce the required or desired effect.
The quality of written and oral expression determines how effective communication will be in achieving its objectives. Whether to inform, provoke, or persuade, communication's primary purpose is to assign and convey meaning in order to create shared understanding. We can assess the quality of expression by considering such factors as content and use of communication medium.
In both written and oral communication, the use of language is the primary determinant of quality of expression. This includes grammar, word choice and vocabulary, sentence structure, and organization. Another important factor is how well thought out the message is. A common adage states, "Good writing is good thinking." In other words, it is difficult to express yourself well without first knowing what you want to say. Communication that is easier for the audience to understand and follow is more likely to achieve its aim than is expression that is confused, poorly organized, or vague.
In addition to word use, communicators can employ visual and nonverbal elements to convey meaning. Pictures, charts, or tables can provide value when expressing complex ideas by synthesizing and focusing on the most important points. Body language, eye contact, and tone of voice can play significant roles in face-to-face communication, and may even have a greater impact on the listener than the words actually spoken.
The communication medium is the channel through which information flows from sender to recipient. Channels include email, telephone, written reports, and oral presentations. One's skill level in using the chosen medium is an aspect of quality of expression. For instance, without training or experience using web conferencing it may be difficult to connect with the audience in ways that effectively convey meaning and understanding.