Online reading is popular among teenagers. It has many advantages. First, it offers rich resources, so we can find almost everything we need. Second, it's convenient to carry and read anytime. Besides, it's easy to share with others, promoting communication. However, there are problems. Some students can't control themselves, affecting their studies. What's more, too much online reading harms eyes and health. Also, blind reading may lead to absorbing useless information. In my opinion, we should use online reading properly. We can set time limits and choose valuable materials to make good use of it.