Android 6.0 has arrived, and with it comes a whole lot of fantastic little changes.

It wasn't always easy to answer the question "What is Android?" in a single sentence that adequately explained everything. Android has always been a complex, almost out of control thing in the way it it constantly changed and adjusted to suit the needs of whoever is using it. While that's an exciting thing to watch unfold from a technical perspective, explaining this to someone who just wants a smartphone to check Facebook and play some video games is mostly just confusing.

With Android 5.0 Lollipop, with Material Design taking over the interface and Google's apps taking a more active approach to encouraging use all throughout the UI, an easy answer to that seemingly simple question might have been that this was now Google's Operating System. This year, with Android 6.0 Marshmallow, we're seeing a level of refinement to Material Design and to the underlying features that came with it. That refinement in many places includes the ability to substitute Google's apps and services with whatever you want, and at the same time making it easier for developers to build those alternatives and have them work just as well as what Google offers by default.

What is Android? With the 6.0 Marshmallow release, Android is the most personal operating system you can put on a phone or tablet. Here's our review.