Visual aids, such as slideshows, must be clear, concise and of a high quality. Use graphs and charts to present data. The audience should not be trying to read and listen at the same time - use visual aids to highlight your points. One message per visual aid, for example, on a slide there should only be one key point
They are the most common because a person is able to put so much more into one without much effort. A slideshow would have more photos to keep people interested. It would have charts and graphs to look at, so that a group of people wouldn’t just be staring at words. It gives the viewer a better intake on what they are looking at and they become more focused since they are more attached to the concept.
