For details, see
Showing incoming call as a pop-up notification.
Check which apps are draining your battery and enable background restriction in these apps. This prevents them from using the battery while running in the background. See
Enabling background restriction in apps.
You have more control over your notifications. It's easier to stop those that you don't want to receive anymore. Just press and hold on a notification to see your options.
When you're using apps such as
Google Messages and
Gmail, you can now reply to messages right from the
Enjoy a refreshed look for some of your favorite UI, such as the
Quick Settings. The volume bar is also more accessible, and you can conveniently toggle between silent, vibrate, and normal modes from it. You'll get delighted as sutle design improvements make for a better overall experience.