This screen shows a list of the currently available games. If there are no games listed, you will need to create one or wait for one to be created. To select the game you want to join, just click on the name.
To create a game simply click on 'Create' and a game under your name will be created.
To join a game just select the desired game from the list and click on 'Join'.
For more information on network games see 'How To Play Network Games and 'Network Troubleshooting