Social Network is a small corpus of knowledge because we can propose and comment, exchange of knowledge or questions on various matters for other persons interested or have the answer to help answer. And it can saves the cost of communicating with others. Also fast and convenient.
You can share your feelings when you stress. It is a great way to entertain yourself after a busy daily routine. It also makes it a lot easier to keep in touch with family and friends, especially if they live far away. And you can also make a new friends by connecting with friends of friends that you might not know.