New Folder Icon
In Android 6.0 or older versions of Android, users were able to create folder with multiple apps. The problem was icons were overlapping and hard to see. Any more than 2-3, and you wouldn't know what all was in the folder.
In Android N Google has changed the visuals for folders, which look far better than before. The Google Now Launcher now has a 3D effect where we're essentially "looking in" into the folder and seeing the icons. It's a nice little change that looks really good. Yes, iOS does something similar, but it looks far better on Android.