When you are trying to make a decision sometimes it is helpful to think of the pros and cons. The pros would be positive outcomes of making the decision, and the cons are the negative results. For example if you were deciding if you should go to a restaurant for dinner or cook your own meal, the pros of cooking your own meal would be: saving money and not having to leave your house. The cons would be having to do dishes and the food not tasting good. The pros of eating at a restaurant would be: yummy food and someone cooks for you. A con would be: it is expensive.
Advantages and disadvantages are similar. The advantages would be the positive or good outcomes associated with a situation or a decision. And disadvantages are negative or bad.