A wardrobe is where you hang your clothes, usually in your bedroom.
Some people have wardrobes which are free-standing pieces of furniture that can be moved and taken with you when you go to another house.
Other people have 'fitted wardrobes' which are built into the room itself, nailed or screwed into the walls. Fitted wardrobes are part of the fixtures and fittings of the house itself, and they cannot be moved.