Presentations, written memos, emails, tweets, media interviews, ads, and meetings are all the venues in which a person or group gives voice. Determining what that voice should be requires careful consideration and constant refinement.
McKinsey published a checklist for people who were assuming the role of CEO. Number 8 on the list: Have I thought through my communications plan— internal and external?
One of the skills I seem to have developed is writing “velvet hammer” prose. By that, I mean writing letters, announcements, greetings, directions, etc. that are simultaneously kind (the velvet) and direct (the hammer).