This document discusses trade unions, their objectives, functions, and importance in industrial relations. It defines a trade union and explains that their primary purposes are to regulate relations between workers and employers, negotiate wages and conditions, and provide member services. The key functions of trade unions are militant functions like achieving higher pay and better work conditions, and fraternal functions like welfare measures and promoting growth. Finally, it provides examples of collective bargaining processes between trade unions and hotel management to resolve issues around reducing employee holidays and layoffs.