I love presentations. I love going to them and I love giving them.
You have a defined amount of time, during which a bunch of people come together to listen to a message.
Whether your presentation is online (a SlideShare, a webinar) or in the real world (a talk to a large or small audience), a formal presentation can create a memorable experience that will educate, inspire, and entertain.
Unless, of course, your presentation sucks. Which, sadly, most of them do.