From the inside
Live trainers and prerecorded voices help trainees understand the inner functions of a company faster. If a point is not clear, a trainee can always rewind/ask the live trainer about it. It is a better way to train someone than handing them a 300-page booklet. Audiovisual content is a powerful training tool.
Auditory aid during group presentations helps make things interesting and easy to understand. Conferences and crunching numbers can become an annoying and lengthy process. After all, most of us have experienced losing focus in a presentation that only involved printed handouts or taking notes. Audiovisual content (pie charts with commentary, videos, slide shows with narration, etc.) helps keep things to the point and straightforward. It saves a lot of time.