Facebook was itroduced by Mark Zukerburg . its a good website and now its availble as a android app . is a best social website .its connecting many unknown people its a good thing with this .and u can add friends as many as u can but if u manintain privicy its good for personal .but many unwanted things happening with this .espessialy teenagers has been addicted to this site .they are loosing this real relations because of this unknown relations . many fake ids had created by this man people are loosing their time and money many hackers bookie are targetting this .and they are steeling their persoal data . but some good this are also there if u wana develop ur bussiness and work facebook can help u more by connecting people