The influence of the Internet on teenagers was complicated, including positive and negative influences. The following are some possible effects: 1. Foster learning and growth: There are plenty of learning resources, courses, and knowledge sharing communities online that can help teenagers learn and understand the world better. 2. Social and interpersonal relationships: The Internet provides a wide range of social venues for teenagers to stay in touch with friends and family, and to join various interest groups and social media communities. Distraction and addiction: The rich information and entertainment content on the Internet easily attracts the attention of teenagers, causing them to use electronic devices for a long time. It is easy to distract their attention and may also lead to addiction to the Internet. Increase social anxiety and loneliness: Online social interactions are often based on virtual identities and virtual spaces. Teenagers may feel social anxiety and loneliness, and it is difficult to establish real interpersonal relationships with their peers in real life. Spreading bad information and behaviors: There are a lot of bad information and behaviors on the Internet, including prostitution, violence, gambling, and fraud. Teenagers may be negatively affected by these information and even lead to bad behaviors and habits. It should be pointed out that the influence of the Internet on teenagers is twofold, both positive and negative. Parents, teachers and society should actively pay attention to and guide teenagers to use the Internet correctly to help them establish the correct values and code of conduct so as to better use the Internet to promote learning and growth.