In the United States, where Internet technology is relatively advanced and the market economy is relatively active, social media tools based on company registration or business communication began to appear at the end of the 20th century. After entering the 21st century, social media around the world has experienced a significant leap in tool types, user range, information functions, and interactive methods. Table 1-1 shows the time when major social media appeared at home and abroad, and Figure 1-4 is an information chart of mainstream social media abroad.