The spread of Islam was mostly developed by trading. Traders from Arabia went all over the world to trade, and they shared their religious ways to other people. Muslim traders also came in contact with people who had different beliefs and culture. Trading really help spread Islam because people also came to Arabia to trade, and Islam was introduced to them. Some people even converted to Islam. That played an important role in the spreading of Islam. Another way Islam was being known was by conquest. Many caliphs and their empires conquered different parts of the world. Most Muslim empires made the people that were already living the land they conquered become Muslims. So the people who were conquered had to learn the Muslim practices and teachings. Mosques were also built almost everywhere the Muslims has conquered. The Muslims had conquered many places in the world such as: parts of Europe, Asia, and Africa. The main point is that trading and conquest played an important part of the spread of Islam.