A trade union is an organization that represents the interests of employees. The role of a trade union can vary, but the core functions are usually as follows:

1. Collective bargaining
Trade unions negotiate with employers on behalf of employees about employment conditions, such as wages, working hours, vacation, pension plans, and other benefits. This is often laid down in a collective labor agreement (CBA).
2. Protecting employee rights
Trade unions ensure that employers comply with labor laws and collective labor agreements. They intervene when employees are confronted with unfair treatment, dismissal, or other labor disputes.
3. Support and advice
Trade unions provide legal support and advice to their members on labor-related issues, such as disputes, contract negotiations, or working conditions.
4. Improving working conditions
Trade unions work to create a safe and healthy work environment by advocating for better working conditions and compliance with safety regulations. 5. Social and political influence
Trade unions try to influence legislation and regulations relating to labour, social security and equal opportunities through lobbying and cooperation with governments and political parties.
6. Education and awareness
They inform employees about their rights, working conditions and the labour market and organise training and courses.

In short, the trade union acts as a collective voice and safety net for employees, and plays an important role in promoting fairness and equality in the workplace.