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Android keeps on releasing newer versions that contain important upgrades on previous ones. The most important change in the Lollipop release was a completely redesigned user interface (UI). It was built around an innovative design language called Material Design. The material design concept was made to give users a paper-like feel to the UI. Apart from that, other changes were also incorporated such as improvements to the notifications bar and its style, which can now be accessed directly from the lock screen without requiring any password and displayed within applications as banners on top of the screen. Internal changes to the platform were also made and it was done using the Android Runtime (ART). Improved application performance was achieved, and it was intended to improve and optimize battery usage as well.