To sum it up broadly.... and i mean broadly because international law is so much deeper than what im gonna explain here.... international law is the treaties and laws that determine how states interact with each other and conduct themselves in a worldy prospective. The highest judicial authority of international law is the International Court and the administrative authority is the United Nations. it can be so much more than that though also... such as economic development within countries, the embargos and sanctions that countries place on each other, etc.
As an international lawyer, you may find yourself representing organizations and companies in ways such as representing their organizations on an equal footing with foreign investors, governments, multilateral organizations, contractors, consultants, etc., develop and implement policies that promote the interests of their organizations, and so on.
International law can be interesting, if you are the type of person who likes politics and the different government entities throughout the world.
i suggest you look into it to see if its something that would fit you.
and applyingsoon - what the hell are you doing on a discussion board if you are jsut going to criticize what everyone says and not give anything worth reading? he asked what international law is, not what some prick has to say about absolutely nothing. get a life, bother someone who gives a *&^%.