Nowadays a great many people use SNS.
You can learn from a summary to cautionary notes of SNS on this page.

It is the knowledge that is you can apply right now, so let's study it deeply of this chance.

First, what is “SNS”?

About how to register for SNS and how to use it.

What becomes after register for SNS?

Let's add to your friends!

The various the way of usages for SNS.

What happen when you retrieve your friend by personal information?

Is it really the person who was registered with personal information?

General method of registration of a friend for SNS.

Connect with a stranger is danger?

Is it all right even if you meat a people who got to know in SNS?

The information that you send or someone send it to.

Summary of this theme.