3 what is good of bad about these kinds of sites?

I think good point is we can get a lot of informations.
Bad point is we can get a lot of unnecessary informations.
This thing deprives of times for us.
4 Do you regularly participate in social networking websites Which ones?

I want to participate in You Tube
This site give me interesting movie and I can knows many countrys coulture
I can that I want to teach thing to teach all over the world