Mega menu is used to give users a bird's-eye view of all the menus in your store, in rows and columns, so that your store's products can get maximum visibility.
By default, mega menus have one row. The default row will have four columns.
A menu item will be created for the product page. Clicking on this will redirect your customers to the product page of the linked product.
Drag and drop existing menu items to a different column to move them around within different columns.
Columns cannot be rearranged as a whole.