Hey WordPress, What's on the Menu?
Check Your Template
Every WordPress site needs two menus, a header menu and a footer menu. This is oversimplifying a bit, but it's a good place to start.
So the first thing to do is check your template.
Some templates only allow one menu. If you've got one of those, dump it. Get one that allows you to build both a header and a footer menu.
Your menus will mainly link to pages, but can also link to posts, categories and custom links, which we'll explore further on in this tutorial.