Google announced Material Design at Google I/O 2014. What is Google Material Design? In short, it’s a cohesive look and feel for all of Google software. Material Design is the answer to the questions “What if, instead of just things on a screen, a UI were a real object?”
So from Android L onwards (the new Android operating system), all Android devices and apps will now be designed using the Material Design visual metaphor. The three principles of Material Design are
Material is the metaphor
Bold, graphic, intentional
Motion provides meaning
If you’d like to delve into the specific of what these are, and why they are more than “just adding drop shadows” as one blogger I saw wrote, there’s a great video run down from The Verge here on what Material Design is, and how it should add cohesion to all Google products. The official run down from Google on Material Design is now up here.