A launcher is an object that performs a specific action when you open it.
You can find launchers in the panels, in the panel menubar, and on the desktop. A launcher is represented by an icon in all of these locations.
You might use a launcher to do any of the following:
You can modify the properties of a launcher. For example, the properties of a launcher include the name of the launcher, the icon that represents the launcher, and how the launcher runs. For more on this, see Section 4.5.2 ― Modifying a Launcher.
In certain situations, a launcher in a menu might not show an icon. For example, if it specifies no icon to display, or if the entire menu is set to show no icons.