Writing and speaking vocabularies must be adapted to the appropriate needs of the audience. Also, suitable graphics and audiovisual aids should be used if they can help clarify material for readers, viewers, and listeners. Trite or wordy expressions, rambling sentences, and unnecessary repetition must be omitted. Concise communication should include only the ideas and facts that are relevant to its purpose. Devices such as repetition should used carefully and in a controlled manner.
Concrete communication is definite, specific, and vivid rather than general or vague.
Whenever possible, exact words and figures should be used rather than general words, as general words may have different meanings for the sender than for the receiver of the communication. Strong verbs in the active voice help make sentences definite. Concrete rather than abstract nouns and well-chosen modifiers can make messages vivid and forceful. Correctness also refers to accuracy. Information which is communicated needs to be as up to date and accurate as possible.