People learn by seeing the action
Adults are skeptics. A visible demonstration of value is often required to open the mind to new learning. Otherwise messages are quickly forgotten.
Reading PowerPoint slides to educated audiences does nothing to enhance comprehension and recall. Engage both sides of the brain by creatively stimulating visual and audio input. Here are but a few ways visual communications support learning.
Book illustrations
Illustrating a new book like Keeping Up with the Quants makes it easier to grasp complex subjects. These are some of the Illustrations for a Harvard Business Press book describing how quantitative analysis can be helpful in general problem solving.
Technical illustrations, precisely right and visually obvious
Technical illustrations are used in a variety of industries to illustrate what would be difficult or undesirable to photograph. Examples include disease treatments, cut away views of buildings, or patent illustrations. The research discipline that goes into accurately depicting such things is also beneficial to other business communicators. We are accustomed to asking the questions that need answers to understand any subject well.

Technical illustrations make complicated subjects clear and engaging.
ITIL Library
The ITIL library teaches how a service desk works
The Information Technology Infrastucture Library (ITIL) includes concepts and practices for managing IT services, development, and operations. ITIL is published in a series of books by the UK’s Office of Government Commerce. To succeed, a general (non-techy) audience must also understand and embrace ITIL basics. Read more about the ITIL library.