The Full Form of AVD is Android Virtual Device.

Android is a mobile operating system based on a modified version of the Linux kernel and other open source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. Android is developed by a consortium of developers known as the Open Handset Alliance and commercially sponsored by Google. It was unveiled in November 2007, with the first commercial Android device launched in September 2008.

You can use Android Emulator to create emulations of Android devices that run your own custom Android system images. You can also share your custom Android system images so that other people can run emulations of them. In addition, you can add multi-display support to Android Emulator emulations.