Bring your presentations to life. Themes allow you to quickly improve the appearance of your presentation. In order to save time when creating your presentation, you can copy, cut, paste and move slides. If you're collaborating on a project with others, it's a good idea to know how to work on the same presentation simultaneously. You can also add comments to make sure everyone is on the same page regarding the presentation with PowerPoint on the Web.
PowerPoint for the Web: Building Presentations