Google Presentations are really useful, since you can put all sorts of content into them, the same way you would a Microsoft Powerpoint slideshow, you can rearrange slides, remove and add on the fly, all sorts of useful stuff.
If you put a Google Presentation into your Rise Display Network Presentation, if you make any modification of your Google Presentation, it will be automatically reflected in your Rise Display Network Presentation after the Placeholder refreshes at its scheduled times. It doesn't get any easier than that.
The best part, is the ability to create Google Presentations comes free with your Google Account.
This short video describes how to create a Google Presentation, publish it for the world to see, and how to put it into your presentation.
Let us know what you think!