There are many possible purposes for using visual aids. Among them are:
- Getting the audience interested. This will be especially true for those who are visual learners.
- Simplify the material. Visual aids can give the audience the most important parts of a complex material.
- Can show relationships and movement. Charts can easily show how various things are related to one another or what sorts of trends are going on with regard to some important statistic.
- Can be more persuasive. A well-made visual can help to persuade an audience in ways that go beyond what you can do with the spoken word.
When boiled down, what visual aids really do is to help convey more information in a way that is easily understood and remembered by the audience.