Nowadays, the Internet is the most powerful tool in the world, it has many benefits. Besides the massive benefits that the Internet has brought to our life, the Internet has many disadvantages. Firstly, using the Internet may waste time and cause distractions. When you are spending much time on Internet-connected devices, you can be an addicted person - who spends much precious time on the Internet rather than doing something productive. Moreover, if you are surfing the Internet frequently, playing games, and spending too much time on the computer, it can also lead to obesity and an unhealthy lifestyle. Not only that, using the Internet too much can separate and bring us far apart in real life. Every morning, when you wake up, the first activity of the people is to check the message or social networks such as Facebook, Instagram, and Zalo... In the meeting, friends meet again but everyone holds the phone in their hands for surfing the web, they just say something and then re-plug their face into the screen. We choose to express our status on social networks instead of talking to our loved ones like friends or parents. We are more and more just chasing the shabby, illusion of society that neglect the real precious things. In conclusion, people need to use the Internet more intelligently and rationally to minimize the harm it brings.