First of all you should create the content pages you need. If you want to add FAQ information for example, you will go to Site Design >> Content Pages >> Add a new page and fill in the information you want to be shown on that page.
After that you can go to the menu section (Site Design >> Menu) and click on 'add a new menu item' and follow the below steps:
- Add the menu name, select what menu item it belongs to (info for example)
- Select for this menu item to link to: link to a page
- Choose the right page, according to the content page name you gave it
- Select if you want this to be opened in the same tab or a new tab
- Click 'Save'
After you have clicked save you will see the new menu item and it being linked to the content page you created.
If you have created the menu items first and only afterwards the content pages, please click on 'edit' next to the right menu item and make sure to fill in the above section for that specific menu item.