Android 5, also known as Android Lollipop, is a version of the Android operating system released by Google in November 2014. It introduced a fresh design called Material Design, which emphasized bold colors, fluid animations, and responsive layouts, enhancing the overall user experience on smartphones and tablets. In addition to its visual updates, Android 5 brought several new features, including improved notifications that can be accessed from the lock screen, enhanced battery management with Project Volta, and support for 64-bit processors. These advancements aimed to make devices more efficient and user-friendly.