A trade union is any combination of workers formed to regulate relations between workers and employers. The key objectives of trade unions are to negotiate wages, working conditions, and dispute resolution. The Trade Union Act of 1926 governs the registration and rights of trade unions in India. While registration is not mandatory, it provides legal status and benefits like the ability to enter contracts. Unregistered unions cannot represent workers or engage in collective bargaining. Employers cannot interfere with workers forming or joining unions.