Create and edit a menu with the menu editor
Go to Content (CMS) > Menus > and press Create Menu.

Then name your menu, for example "Main Menu".
You can either add Categories, Brands, Pages (which you have created as standalone pages in the CMS) or a Custom link by pressing "** Add menu items**"


You may also import the whole category tree which you created in Products (PIM) > Categories.
This will give you the structure you have already setup directly. You may also rename the categories and drag and drop them to create a different structure.
Renaming and dragging categories won't change the breadcrumb and the category structure which you created in Products (PIM) > Categories.

Next step is to decide where the menu shall be placed in your storefront. The locations available are set by your page design & configuration. Base locations are Main - Desktop, Main - Mobile, Footer - First, Footer - Second, Footer - Third, Top bar and Info pages. You may have the same menu on all however it's not recommended.
Last step is to decide which channel the menu should belong to and which language.

Press "Save" and your menu will be published in your store.
Create a content page with included menu
During the process of creating a stand-alone page, you have the choice to determine whether or not you want the page to include a menu.
Create and edit the start page
If you want to create a new start page and enrich it with content start by going to Content (CMS) in the left menu in Merchant center and press Start Page.