Mobile Menu is a section located inside the Header section. It allows you to configure the mobile menu displayed on your store.
Follow this documentation to understand how to configure it.

Menu mobile: By default, the mobile menu will display the main menu selected in the Header settings. If you want to show a different menu on mobile, select the menu here.
Add menu categories: Select the menu that will be displayed in the Menu Categories tab.
Only click icon: By default, clicking the menu link will open the submenu.
If you enable this option, clicking the link will redirect customers to the link, and only clicking the icon will open the submenu.
Color menu mobile: Select the color scheme for the mobile menu.
Notice: This option allows you to edit the notice content displayed in the mobile menu. The notice content supports HTML.
Available from version 5.4.3.
This block allows you to display a list of collections with images. It will appear inside the first accordion item of the mobile menu.