Nowadays, advertisement is crucial for every field of products or services. However, there are some kinds of products which are controversial whether they is proper to advertise; one of these is fast food. Some citiziens had a belief that it is not right to present fast food ads while others thought that fast food also had right to be advertised. Personally, I am convinced that junk food companies should have the right to present their products due to companies' rights, customers' freedom, and economy.