A labor union, also known as a trade union, is an organized group or collective representation of workers or employees in a particular industry, firm, or profession. Its major goal is to safeguard and improve its members' rights, interests, and working conditions via collective bargaining, advocacy, and other types of labor action.
Example
In a manufacturing business, the labor union negotiates with management on behalf of the factory workers to gain higher salaries, better safety standards, and more equitable working hours. If discussions fail, the labor union may declare a strike to apply pressure and accomplish its members' goals.