Google has updated their Slides app for Android recently to include support for controlling presentations using an Android Wear smartwatch, meaning you'd be able to navigate through your presentation with little effort and simply by using your wrist, instead of having to scroll through each slide using your smartphone or tablet. Other than the newly added support for Android Wear devices, Slides also includes some bug fixes and performance issues, but this is usually to be expected from just about any app updates that are released, and naturally they exist here as well so Slides should end up running a bit smoother for users.
Once users update their Google Slides app, they'll eventually see a companion Android Wear app for Slides show up on their watch, and with this users can control the presentations for Slides that are being streamed to Chromecast devices or through Hangouts. Google does not mention that Slides presentations on a tablet or smartphone can be controlled via the Android Wear support, so it's likely that this is not a possible functionality.
Based on the changelog from Google in the app's "what's new" section, the bug fixes and performance improvements as well as the Android Wear support are the only additions to the app following this update, so the update is rather small in terms of actual changes. Having said that, if Android Wear support for controlling presentations from your wrist is something you've been waiting for then this probably feels like a much larger update. While this is a small list of changes, this update follows another minor update to Slides that was pushed out back on September 17th, which added the ability for users to see lockscreen notifications for Slides. That update was just a couple of days ago, so it's understandable that Google wouldn't be pushing out a major update just yet, especially when considering that these two updates together make it more of a sizable one with multiple features. If you don't yet have Slides installed you can grab the app from the Play Store button below, otherwise the update should show up in your my apps list.