Pros:
It can be used as much as the imagination of the presenter allows, so it is used to project large audiences.
You can illustrate objects or ideas that would be very difficult to visualize with any other resource.
You can show moving images giving realism to the cases that are required.
Cons:
There are technical problems, therefore there is a waste of time.
There is dehumanization, monotony and dependence.
There is stagnation and passivity of the audience.