When the web UI is accessed for the first time a series of configuration dialogs will be displayed to the administrator. It can be cancelled using the 'skip' button in the top-right corner.
Below are the default windows and window sections that will appear.
MAAS (region) name
Connectivity (upstream DNS server, Ubuntu archives, and HTTP proxy)
SSH keys (for currently logged in user)
Here, one key is already imported as this was added when the administrator was created via the CLI.