1. An unionised organisation is a place of employment where there is a union representing the workforce while the latter has no union.
2. Simply put, the purpose is to look after the interests of the members.
3. Union may be able to help members to get better terms and conditions of service and the protection of the rights of the members.
3. It is not a simple process to form a union. Too long a story to tell here. Try to do some research by visiting the website of the Trade Unions Affairs Department of Malaysia.