If you are designer then this article is for you. I did not write this article. Actually i got this useful article from http://www.smashingmagazine.com/2015/05/15/sketch-with-material-design/
So i will give credit to smashingmagazine for this article.
The tools are an extension of our hands, and as such, must be versatile, fast and intuitive. Much has changed between the era of offset printing presses and the digital era of multi–platform screens.
Developers have tried to adapt our tools, but Sketch is perhaps the most successful application in this regard – its creators have taken the swelling began again and has a smaller feature set fit for purpose. What may seem on the surface to be a simple drawing tool nails done in the basic workflows of digital design. The latest version of Sketch (3.2) came with something special for those interested in the ultimate visual design language Google: the sheet material design labels. In this tutorial, we will design a test application with the help of Sketch and label sheet material design.
If you want to know more about this then please visit at http://www.smashingmagazine.com/2015/05/15/sketch-with-material-design/