When we are dealing with the applications, website or system that have a large number of different sections or subpages, then in that scenario, we need to provide users with some means of navigating across all of the application. However, a simple menu can be sufficient to contain all of the multi-levels within the site or system.
Multi-Level dropdown or “Fat Menu” fulfil these requirements by consolidating all of the different sections of the application into one list, which is further divided into subcategories and can be accessed from a navigation bar.
Multi-Level Dropdown Menus represent a form of progressive disclosure, which is a user interface design concept that focuses on providing users with information only when they request it. While presenting all of the navigation points, for the particular navigation, users are able to investigate a wide range of options.
Multi-Level dropdown menus provide flexibilities in navigation in segregate form. A small sketch and icons can make the impact so that users can take appropriate action on elements. Being small in size comparatively, the small menu is not clickable and usable. So Multi-Level Dropdown Menus create the proper impact on usability.