Material design is a design language developed by Google and announced at the Google I/O conference on June 25, 2014. Expanding upon the "card" motifs first seen in Google Now, it is a design with increased 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 and reform intelligently. Material has physical surfaces and edges. Seams and shadows provide meaning about what you can touch." Google states that their new design language is based on paper and ink.
As of 2015, material design is incorporated in most of Google's mobile apps for Android including Gmail, YouTube, Google Drive, Google Docs, Sheets and Slides, Google Maps, Inbox, and all of the Google Play-branded apps, and to a smaller extent in the Chrome browser and Google Keep; as well as in the desktop web interfaces of Google Drive, Docs, Sheets, Slides and Inbox.