Whiteboard animation is a solution to a certain business challenge of how to deliver a message without confusing your target audience. The format is effective because it requires clarity.
It happens frequently that businesses fail to describe what they do or sell precisely due to the fact that they have been working with it for a long time and understand too much about their product. Thus, communication becomes complicated. They write copy that is difficult to understand because it contains a lot of information that needs to be explained. They spend discovery calls explaining what is written on their website.
The whiteboard animation solves this problem by not allowing any vagueness or complexity. Any element that is used should add to the core message that needs to be delivered. This restriction becomes an advantage for some types of business.
For example, compliance teams require verifiable information. Financial advisors need to provide securities education. Doctors need to explain procedures, and manufacturers need to train in safety.