[itsdevlin]

There are to very specific versions of how a presentation should be made: As a supplement to a live presentation or a replacement of it.

If you're using it as a supplement to something you're saying live, the slides should be simple, limited, and support the big points which you should be making verbally.

If you're using it as a handout (or essentially in lieu of a live presentation), it should be much more information-dense.