How did boycotts help unions?

Boycotts helped unions by allowing workers to leverage collective consumer power against employers, thereby pressuring companies to meet their demands for better wages and working conditions. By encouraging the public to refrain from buying products from companies that resisted unionization or mistreated workers, boycotts raised awareness of labor issues and garnered wider support for union causes. This solidarity often resulted in increased membership and negotiating power for unions, ultimately leading to successful labor agreements.