Why is the dispute settlement body of the WTO so important,and how is it affecting the EU?

Why is the dispute settlement body of the WTO so important,and how is it affecting the EU?

-Essay Question: Why is the dispute settlement body of the WTO so important,and how is it affecting the EU?

-The essay should be based on two case studies:
1th- a case of the EU-US hormone treated beef dispute
2th- and also a case study of the asbestos-containing products!!!