...
Your configuration will be created once the details page has been saved. All other information in the Configuration Wizard will then be applied to your newly created Configuration
Name
The Configuration Name is used to identify the configuration. Each configuration name must be unique and should reflect the task that it will be responsible for building.
...
The Cleanup policy step allows you to specify how older builds should be cleaned up for this configuration. This overrides global and project level cleanup policies. See the Cleanup Policies section for more information.
...