What is GB? It's one of the most popular instant messaging apps in the world, and the most popular in the world for mobile devices. It has more than 2 billion downloads on Android and more than 500 million on iOS. It's used by more than 500 million people in more than 180 countries.

GB is the official WhatsApp app in the United Arab Emirates, Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, Jordan, Morocco, Algeria, Egypt, Tunisia, and Canada. It's also the official app in Greece, Spain, France, Germany, Italy, and Hong Kong.

Why is it so popular? It's simple and easy to use. You can send text and multimedia messages to anyone. You can also send and receive messages and files. It's free to download and use.