Drop-down fields are easy to use, because of the simplicity of picking an option from a list.
What if you wanted to limit the options that can be selected from a drop-down list depending on what the form user selected earlier?
It is now possible with dynamic dropdowns.
You can create more than one drop-down list with this widget, nesting any number of child drop down lists within related parent lists, such that when the user selects one option in the parent list, the related child lists are displayed.
It is useful for basically any form with a limited set of listed options from where you want the user to select.