Created by Andreas Eracleous, this pen is a high-quality example of a navigation bar or menu bar. You can place your brand name on the left side of this menu bar and on the right side, there’s a menu icon clicking which open ups menus including drop-down menus. So the menus contain links and drop-down menus that also contain links. This kind of nesting of menus is pretty useful. This way, you can put your menus in different categories. So there will be different categories of menus. By clicking the menu icon again, the menus collapse.
So you can see the menus when you click the icon. As the menus are hidden, your webpage will look simpler.