I know the facebook. Should nobody meet in this world did not know~ Human may glance over the world who in there. May know very many dissimilar countries friend. The face book is a good website.
I know it sure. I think it very useful site because I have found my old freind in primary school that not met for a long time.Further more,I can make follow someone who i want to know her/his life. Who want to add me on facebook?.LOL
I think no one can't know Facebook. It's so popular. But it's so time-wasting to use it. Anyway, it's still the most popular social network in the world.