Today we launched several features aimed at improving integration between Google Sites and other products. When sharing on social media sites, Google Sites now will showcase images in posts. You’ll see this change when you share Sites links on Google+ and other sites. Google Analytics support on Sites has been improved to support Universal analytics. Finally, Sites can now embed Google Maps Engine Lite, so custom maps you have created can be shared side-by-side with your content.
Rapid release, with Scheduled release coming later in June
For more information:
Reference by : http://www.google.com/