Twitter

Twitter is a social networking online where you can read and share text messages. It is not necessary to log in to see the comment of other people but if you want to publish something you have to have an account. You can use Twitter in English, Spanish, Japanese, Italian and French.
If you want to have news about somebody or see his twitters, you can follow him. 
I have an account in Twitter: @LaiaArenasC 

Go to Twitter and have an account.