Advantages:
Increased revenue as the customer base has increased, from you local market to a global market.
Increased productivity. International markets are more competitive since companies from all around the world participate in these markets, the competition encourages productivity so local companies that enter international markets will become more productive.
Increased employment. This is possible because the company may need to hire more employees if it’s going to expand its customer base and meet their product demands, it’ll need people to make those products, advertise them and sell them, so they’ll need to hire additional staff to do that on a global scale as compared to how they used to do it on a local scale.