When you create a new site, you link it to one or more spaces. You can add spaces later on from the Content Sources module.
Search box: Type keywords to filter the list of spaces included in your site.
You can personalize the address of each space. Enter a custom name that will be displayed at the end of the URL.
NOTE
Customizing the URL serves as an easy-to-remember shortcut, but it's not permanent. Once you navigate to a site, the URL dynamically changes to the actual address.
Add spaces: Select the button and choose one or more existing spaces to include them in your site.