A more thorough explanation:

A trade union is an organization made up of workers who come together to protect their rights and interests in the workplace. They negotiate with employers on behalf of their members to improve working conditions, wages, and benefits.

For example, a group of factory workers may form a trade union to demand better pay and safer working conditions from their employer. The union would negotiate with the employer to reach an agreement that benefits both parties.

Another example is a teacher's union that advocates for better working conditions and pay for teachers. They may negotiate with school boards or government officials to improve funding for schools and increase teacher salaries.

These examples illustrate how trade unions work to protect the rights and interests of workers in various industries. By coming together and bargaining collectively, workers have a stronger voice and can achieve better working conditions and wages.