Nowadays,Facebook is very popular for teenager. Because they can communicate faster and easier to send information to each other. The advantages of Facebook are meeting some good friends, fans, that comment to encourage each other, communicate and exchange opinions.Facebook can post photo and we can post some comments,taking a video call or audio call to friends or family. For example,If we travel to the waterfall and we can post pictures of us into Facebook immediately to share experiences with friends and other people.But Facebook also has disadvantages.For example, it will make children not concentrate on learning, youth violent. And other proplems.