Hey Shree! 

International Business is a boarder term, which is sub-divided into International Marketing, Finance, Human Resource and Operation. So, you can study one Domain or more than domain in depth. For instance- if you want to study Marketing, you will study about the domestic market as well as the International Market. This broadens your horizon, plus gives you immense opportunity to apply in Foreign trade Companies. Best wishes! 

International Business is the management education specialisation that trains and imbibes skills on different aspects of business and marketing at a global scale such as National and International Business Strategy.

The programme exposes you to various aspects of International Business like international marketing, global supply chain etc.
Usually companies offer a global leadership role for international markets in which you get a chance to work in different countries on top positions. They could also offer management trainee roles in various verticals. These usually include marketing and sales, Business Development, Finance, Strategy or Operations and supply chain.

Good Luck!