What is the main aim of montreal protocol?

The main goal is to protect our ozone layer. This layer is high up and it is like a shield. It protects us from the sun's bad rays. Some chemicals we used in old fridges and spray cans were making a hole in it. So, many countries agreed to stop making and using these bad chemicals. This helps the ozone layer to heal and fix the hole. It is a plan for the whole world to work together.