This is where you post something. Once you’re done (have clicked the Update link on the right), click the Appearance link on the left, then Menu and then Post and then “check all” and add to the Top Menu. Do the same for the bottom menu (or they may be called Primary and Footer).
Then you can drag the link you’ve created, in the list on the same page, to where you want it. I would put it just above Contact.
You can delete this now or wait until you’ve written your first post.