Accordion menus are a type of display widget found on desktop and mobile apps. They allow you to display a large number of menu options while conserving space. But before you use them, you should know how to best design them for your users.
Every accordion menu needs an affordance icon to tell users what happens when they click it. They should expect the menu to expand with more options. But where you place your icon and what icon you use can affect user task time and expectations.