Android Oreo is the eighth major version of the Android operating system, released by Google in August 2017. It introduced several new features, including improved battery life through a feature called Background Limits, which restricts background activity for apps. This helps devices run more efficiently and prolongs battery performance. Another significant addition is the Picture-in-Picture mode, allowing users to watch videos while multitasking on their devices. Android Oreo also enhanced notifications with a new design, making them more interactive and easier to manage. Overall, it aimed to improve user experience and device performance.