Android 4.3 is a version of the Android operating system released by Google in July 2013. It introduced several enhancements, including improved performance, better battery life, and support for Bluetooth Smart technology. This version also featured a more refined user interface and added support for multiple user accounts on tablets. One of the notable updates in Android 4.3 was the introduction of the OpenGL ES 3.0 graphics API, which allowed for more advanced gaming and visual effects. Additionally, it included improvements to the notification system and enhanced security features, making it a more robust platform for both developers and users.