REALLY ITS name satis fied its function through book we can get knowledge or increase the knowledge .through this facebook we can know about millions of news and other details through subscribing in the following page.now a days no one has such a time to sit and read news paper but one can easily handle this by giving subscription through many pages in facebook it gves us updated second by second.it is also a mediumof communication between relatives, friends and community.one can have chat with live conversation through video callling feature of the facebook.facebook website looks pretty good.its give much more security than the other social media more over it is much more easier to use at.at time going the websites are updated day by day and are looking to make the site much more simpler than the past time.it also gives promotion of a product through various blogs spread in facebook.inspite of having all the above features it also has some cons like students spend too much time on it so it hampers there study .in a word one can say it is really a good service to take all the functions with in a circle.now a days no one can deny the usefulness of such a kind social medias.