For questions related to the usage and features that are specific to version 3.3 of Android Studio - the official IDE targeted at Android development. When using this tag also include the more generic [android-studio] tag. Do NOT use this tag for questions about programming for Android in general; instead use the [android] tag.
Android Studio 3.3 is a major release that includes a variety of new features and improvements.
IntelliJ IDEA 2018.2.2
The core Android Studio IDE has been updated with improvements from IntelliJ IDEA through the 2018.2.2 release. Android Gradle plugin updates
For information on what’s new in the Android Gradle plugin, see its release notes.
Navigation Editor
The Navigation Editor lets you quickly visualize and build navigation into your app by using the Navigation Architecture Component.
Delete unused Android Studio directories
When you run a major version of Android Studio for the first time, it looks for directories containing caches, settings, indices, and logs for versions of Android Studio for which a corresponding installation can’t be found. The Delete Unused Android Studio Directories dialog then displays locations, sizes, and last-modified times of these unused directories and provides an option to delete them.
Lint improvements
Lint, when invoked from Gradle, is significantly faster—larger projects can expect lint to run up to four times faster.
Create New Project wizard
The Create New Project wizard has a new look and contains updates that help streamline the creation of new Android Studio projects.
Know more about new release : Android Studio release notes