The National Labor Relations Board (NLRB) is a federal agency in the United States responsible for overseeing and enforcing labor laws related to collective bargaining and labor union activities. It ensures that employees have the right to engage in union-related activities and protects their rights to organize and bargain collectively with their employers.

Example
If a group of employees at a manufacturing company wants to form a labor union to negotiate for better working conditions and wages, they can file a petition with the NLRB to hold a union representation election. The NLRB will oversee the election process and ensure it is conducted fairly, allowing employees to express their desire to be represented by a union or not. If the union is approved, the NLRB will facilitate negotiations between the union and the employer to reach a collective bargaining agreement.