The iPad's interface is divided into two major parts: The home screen, which holds icons and folders, and the dock, which provides quick access to certain icons and folders. The primary difference between the two is that the home screen can be changed by swiping from left to right, which brings up the spotlight search screen, or from right to left, which can bring up additional pages of app icons. The dock always stays the same.
Once you master navigating the iPad and organizing it by moving icons around the display and creating folders, you can arrange the dock by putting your most used icons on it. The dock will even allow you to put a folder on it, which can give you quick access to a whole range of applications.
In addition to the home screen and dock, there are two other important areas of the interface. Between the home screen and the dock is a small magnifying glass and one or more dots. This indicates where you are at in the interface, with the magnifying glass symbolizing the spotlight search and each dot symbolizing a screen full of icons.
Above the home screen at the very top of the display is the status bar. On the far left is an indicator displaying the strength of your Wi-Fi or 3G/4G connection. In the middle is the time, and at the far right is a battery indicator displaying how much more battery life your iPad has until you need to plug it in to recharge it. Tips to Save Battery Life