QQ is a popular instant messaging software developed by the Chinese company Tencent. Launched in 1999, it allows users to send text messages, voice messages, and multimedia files. QQ also offers features like online gaming, social networking, and virtual goods, making it a versatile platform for communication and entertainment. In addition to its messaging capabilities, QQ has a large user base, particularly in China. It supports group chats and has integrated services such as QQ Music and QQ Games. Over the years, QQ has evolved to include mobile applications, catering to the growing demand for communication on smartphones.