A picture can paint a thousand words. Using good-quality visuals can be a very powerful way to enhance your message and make it more memorable. Research shows that retention of information increases when information is shared both visually and orally.
Visual aids give your audience:
Something to look at—very important especially for those who prefer to receive information visually
A means of putting your message into context, especially if it is complex, by providing an illustration or example to show exactly what you mean
Variety—another source of stimulation
Start with a framework for your deck—a sketch to scope out what slides you want to support each point or story you want to highlight, such as ...