Your online store has two default menus that appear on every page: the main menu and the footer menu. You can add, remove, or edit menu items in your online store's default menus.
The main menu appears on the header of all pages:
In most cases, you need to create an item before you can link to it. For example, you need to create a collection before you can add it to a menu.
You can view and change your online store navigation from the Navigation page in your Shopify admin. For more information, see Set up drop-down menus in your online store
You can setup Menu with Dropdown or Mega Menu layout.
The footer menu is usually displayed as items across the width of the footer. A customer will probably look at your footer menu to find information about your store policies and contact information.