Site Title

Every site has a Title by default (you're asked to provide a Title of some kind when you first create the site) and this can be changed at any time.  

Click in the Title area to make a change.  

And type whatever you want.   It should be fairly short and to the point.  Like the title of a book or a newspaper headline. 

If you delete the entire Title, it may be hard to pull it back up to enter a new Title.  What then?

If this happens, open up the Settings tab and enter the Title you want in the Site Title field.  

From here you can also select whether you want to show the Site Title at the top of your site.  You can turn it off so it doesn't show up.  But  why would you want to do that?  Because every Site needs to have a Title for search engines, even if you don't need a Title to show at the top of the site.