Internet has played a great role in changing the world, mainly in the following aspects: 1. Change people's lifestyle: The Internet has changed the way people get information, study, work, shop and socialize, making people's lives more convenient and colorful. 2. Promote international cooperation: The Internet has broken geographical restrictions and made it easier for people from different countries to exchange, cooperate and share knowledge, thus promoting the process of globalization. 3. Promote economic development: The Internet provides a broader market for enterprises, making it easier to start businesses, promoting the development of the new economy, and at the same time causing pressure and impact on the traditional economic model. 4. Strengthen government governance and democratic participation: The Internet has promoted exchanges and interactions between the government and the people, improved the level of government governance and democratic participation, and strengthened social supervision and anti-corruption. 5. Bringing new security challenges: The Internet has also brought new security challenges, such as cyber crimes and cyber security risks, which need to be jointly addressed by governments and the international community.