A presentation that uses a software program like PowerPoint can enhance a talk by providing visual cues for elaboration and development, and aiding people who maximize understanding with seeing what is being said rather than just hearing it.
When the software is not used effectively, it becomes a page of written text in which the audience gets lost because they are more prone to try to read all that stuff (“Ssh! Mr. Speaker I’m trying to read, be quiet!”) instead of listening to the speaker develop the key concepts/terms. And of course the implications for the presenter: what type of eye contact does he/she make with the audience when there is so much text to read from either the screen or monitor?
Need I say more?
Then, there is also the issue of transitions and animation which we all like for the WOW! factor. Problem is that before we use it we aren’t interested in learning about it. We click these “cool” options, let the software program randomly choose the effects and we don’t bother modifying or adjusting things. As an end user of software, yeah, the possibilities are endless. As a good end user, we are quick to judge what is ineffective and correct it.
I shouldn’t toot my own horn, but after years of training in marketing, I prepare some fantastic presentations. I also, for a short while, trained the corporate and academic world on creating effective PowerPoint presentations (part of a previous career). Ultimately, the advice I am willing to share with everyone is don’t use it just because everyone else does (didn’t your mother warn you about that long ago?). Use it as a tool to enhance what you need to say, not just present what you are going to read to them.