If you’re an Android user, you may have heard about Android 4.3, the latest update to Google’s mobile OS. And if you rock one of the Nexus devices, such as the Nexus 4, Nexus 7, Nexus 10 or the Galaxy Nexus, chances are you may already have got it. These Nexus devices are the first ones to receive the update rolling out currently, but since the last version was 4.2.2, you may be wondering what the brouhaha is about. In a way, you’re right – this is just an incremental update, but since Android is relatively a new mobile OS (it’s closest rival iOS is now approaching version 7), even a tiny upgrade is enough to send the interwebs into a tizzy, and not without good reason. While there are a few new features that users can directly make use of, Android 4.3 also includes quite a few under-the-hood improvements. Let’s get a closer look at what goodies it brings with it.