Android 5.0 was first unveiled under the codename "Android L" on June 25, 2014 duringa keynote presentation at the Google I/O developers' conference. Alongside Lollipop, the presentation focused on a number of new Android-oriented platforms and technologies, including Android TV,in-car platform Android Auto, wearable computing platform Android Wear,and health tracking platform Google Fit.
Part of the presentation was dedicated to a new cross-platform design language referred to as "material design". Expanding upon the "card"motifs first seen in Google Now, it is a cleaner design within creased use of grid-based layouts, responsive animations and transitions,padding, and depth effects such as lighting and shadows. Designer Matías Duarte explained that "unlike real paper, our digital material can expand andreform intelligently. Material has physical surfaces and edges. Seams and shadows provide meaning about what you can touch." The material design language will not only be used on Android, but across Google's suite of web software as well, providing a consistent experience across all platforms.