Select the correct definition for the term 'Group.'

The definition of 'Group' as used in this context refers specifically to the organization of a system of users. Groups are essential in various systems, including software platforms and organizational tools, as they allow for the categorization and management of users based on shared attributes, roles, or permissions. This grouping facilitates streamlined processes such as communication, collaboration, and access control, making it easier to manage user interactions, resources, and data permissions within a system.

The other options focus on different functionalities: storing document metadata pertains to a unique aspect of data management, while displaying lists of items relates to information presentation rather than user organization. Thus, the interpretation of 'Group' as a means to organize users stands valid and plays a crucial role in enhancing user management efficiency.