The National Labor Relations Board (NLRB) is an independent agency of the United States government that was created by the National Labor Relations Act of 1935 (NLRA) to administer and enforce labor law in the private sector. The NLRB is responsible for conducting representation elections, investigating and remedying unfair labor practices, and adjudicating disputes between employers and employees or labor organizations.

The NLRB is composed of five members who are appointed by the President of the United States and confirmed by the Senate. The members serve staggered five-year terms and the President designates one member as the Chairman. The NLRB also has regional offices throughout the United States that are responsible for conducting investigations, holding hearings, and enforcing decisions.

The NLRB's primary functions include overseeing the process of union representation elections, investigating and remedying unfair labor practices, and adjudicating disputes between employers and employees or labor organizations. The NLRB also has the authority to issue rules and regulations to implement the NLRA and to issue injunctions in certain situations.

Overall, the NLRB plays a critical role in protecting workers' rights and promoting fair labor practices in the private sector. Its decisions and actions have a significant impact on the relationship between employers and employees, as well as the broader labor movement in the United States.