The System Tray is the special location where small icons are shown, representing programs running on your computer and easy to access. Is located in the right of the task bar (where Start button is). Usually, the task bar is on the bottom of your screen.
Known also as Notification Area, it means, the area on the taskbar to the right of the taskbar buttons. The notification area displays the time and can also contain shortcuts that provide quick access to programs, such as Volume Control. Other shortcuts can appear temporarily, providing information about the status of activities. For example, the printer shortcut icon appears after a document has been sent to the printer and disappears when printing is complete.