I do not really need to learn anything about google presentations. I have done plenty in almost all of my classes. Some positives about them is that they're extremely simple. You have a slide, you can write on it, add pictures, etc. It is a fast and easy way to make a presentation with a lot of information to get across. Some negatives would be that it's not a video that you can share easily. For others to see it, you have to share the whole thing and it's not in the presentation format but the edit format. It would be really nice if you could create the presentation and share it with others just to view.
I have used prezi a few times but I don't know much about it. I would like to see how much you can actually do on prezi that you might not be able to do on google presentations. Some positives about prezi is that you can import google images or videos off of youtube, much like the google presentations, but you get to choose from a big library full of 3-D designs. The transitions it has are very cool and will help you keep peoples attention. Some negatives would be that they are only as long as the template allows. So check the template you choose before filling in all your information, this way you'll know if there is enough room or not.