Android M was unveiled at Google I/O 2015, and if you checked the Live Stream or the Live Blog I did at Andro Dollar you already have a good idea about what it has to offer. Like I mentioned in my dedicated Android M Article, Google made the Preview builds available for the Nexus devices and I downloaded and Flashed it on to my Nexus 5 to share my Hands on impressions with you guys.
If you have a Nexus Device, Checkout my Tutorial on How To Install the Android M Developer Preview here.
Checkout the video below, and Share it with your friends who are interested in knowing what new features are there in Android M.