What is the role of a "shop steward" in a labor union?

The role of a "shop steward" in a labor union is primarily to act as a union representative who advocates for employees on-site. Shop stewards are typically elected by their peers and serve as a direct link between the union leadership and the workers at a specific workplace. They are responsible for addressing employee concerns, ensuring that the terms of the collective bargaining agreement are upheld, and providing representation for workers in grievance proceedings or disciplinary actions. This function is vital as it helps maintain communication and support for union members, ensuring their voices are heard within the organization.

Other roles mentioned in the options, such as negotiating contracts or leading union activities, are typically reserved for union officers or negotiators, rather than shop stewards. Additionally, while a shop steward may sometimes facilitate communication between management and employees, the primary focus is on representing and advocating for employees at the worksite rather than serving as a formal mediator.