A Drop-down list or drop-down menu for WordPress is a comprised list of items that are concealed within a given text field. Drop-down menus act as a graphical element that exists on a web page to resemble a list box, usually allowing a single selection from the list. When a drop-down list is not selected, the values are hidden and the display shows a single item on the list.
Drop-down menus are beneficial when a need to provide numerous selections within a confined area arise. Common uses for these are typically found in forms and other sign-up pages labelled as a surname, state, preference, gender, etc. There are way more applications to drop-down lists and these are just a few ways they are used.