Android 9.0 Pie is a version of the Android operating system developed by Google. Released in August 2018, it introduced several new features aimed at improving user experience and device performance. Key enhancements include a more intuitive gesture-based navigation system, adaptive battery management that prioritizes power for frequently used apps, and improved notifications. Additionally, Android 9.0 Pie focuses on digital wellbeing, offering tools to help users manage their screen time and app usage. It also includes security updates and support for notch displays, making it compatible with a wider range of devices. Overall, it aims to create a more personalized and efficient mobile experience.