SNS(Social Networking Service) is used by people of the world.
But, there are the points that you should be careful about.
・You should confirm that the people who you registered as a friend is really your friend, or not.
・You should not speak about your private information.
・You should be careful when meet with the friends who you know in the SNS in the reality.
・You should not post sentences and images which may injure someone.
・You should not believe the information without thinking about believability.
If you are careful about them, SNS will become the tools which everyone use comfortable.
You should be careful abou them.