Advantages:
1)Internet gives information.
2)Internet plays an important role in forming the personality.
3)Education is one of the most important primary function of Internet.
4)All the possibilities that we've got with Internet are amazing.
5)We can always known what's happening in the world.

Disadvantages:
6)Sitting in the Internet non-stop is really bad, because you can be addictioned.
7)We can see a huge amount of horror news, we can see documentaries about killers, gangsters and so on.
8)People are overused in many cases. For example, many people spend hours just chatting about silly, unimportant things or looking through sites for no special reason even at work.
9)You can get online abuse or unkind messages to yourself or your friends. It is very offensively for everyone.
10)Рeople can become lazy, forgetful, sleepy, live on the Internet, forgetting about real life.