Employees decide to join or form unions for five main reasons: 1. To gain power in negotiating wages, benefits, and working conditions, as unions allow employees to collectively bargain with employers. 2. To have a voice and be able to openly address concerns over issues like pay, hours, and safety. Unions give employees representation and advocacy. 3. To receive additional protections like grievance procedures to challenge disciplinary actions, and protection from unjust termination. 4. To gain job security through the terms of union contracts which define grounds for dismissal and layoffs. 5. To receive additional benefits like health insurance, paid time off, and retirement plans negotiated by unions.