1.Which social networking applications do you use?
The social networks I use is twitter, google plus, and Instagram.

2.How often? How many of your friends use them?
I rarely use them I dont know how often my friends use it.

3. How important are these web applications to your lives? How have they changed your lives?
These web applications are not important to me i careless about it.They have not changed my life with no way.