Every few months, Google releases a new update for Drive app for Android and iOS operating system. The new application brings a few new things along with improved performance. The first new feature is streaming for your video files on Android 3.0 and higher.
Another new feature is intended for presentation viewer, which has received pinch-to-zoom support. In terms of improved performance, Google didn't specify what it improved and instead they described that as general bug fixes and other improvements.
The version number goes up to 1.1.592.10 and is available for download directly from Google Play store.