A labor union is an organization formed by workers to protect their rights and interests in the workplace. Unions negotiate with employers on behalf of their members to secure better wages, benefits, and working conditions. They aim to give workers a collective voice, making it easier to address issues that affect their jobs. Labor unions also engage in activities such as organizing strikes and advocating for labor laws. They play a crucial role in promoting fair treatment and ensuring that workers have a say in decisions that impact their employment. Examples of labor unions include the American Federation of Labor and the Service Employees International Union.