This feature creates a bridge between your SetupCast project and your SetupBuilder project. The result is that your SetupCast project becomes "aware" of the information in your SetupBuilder project and can automatically update its information from it.
When you import a SetupBuilder project (with Drag and Drop onto the SetupCast screen) or create a new project and say yes to the prompt that the project is SetupBuilder related, this link is automatically established.
Note: To make SetupCast easy to use for developers who are NOT using SetupBuilder, when the checkbox above is unchecked - all references to SetupBuilder and SetupBuilder related controls are hidden.