With Mountain Lion Apple has added Notification Center to OSX. It works and looks very similar to what you are probably already used to on your smart phone. If you have an iPhone or iPad then you are very familiar already because it works almost exactly the same except you do not swipe from the top down, there is a button on the menu bar.
If you are an Android user then you understand the concept of notification center, just not the features.
In this episode we show you where Notification Center is and how to set it up.