What feature does a workflow group file enable in Alteryx Designer?

The correct answer highlights that a workflow group file allows users to open multiple workflows as one cohesive unit in Alteryx Designer. This feature is particularly useful when you want to manage and access related workflows simultaneously without needing to open each one individually. By grouping workflows together, users can streamline their processes, maintain organization, and enhance productivity, especially in complex projects that require the use of multiple workflows in conjunction with one another.

Grouping workflows also aids in collaboration as multiple team members can easily access and work on different parts of a project housed within a single file, improving workflow coherence and efficiency.