For me, it's a great place to stay in touch with friends who I might not have otherwise been in touch with so often. It's a good way to share holiday photos and keep up to date with what your friends are doing. When travelling you can send updates to all your friends and family at the same time, so it's also convenient. I have friends in other countries and I love knowing the little things they've been doing each day. Some people enjoy catching up with old friends they haven't been in touch with for a while for example you can join your School's or past Employer's Groups, and be in touch with people you once used to know, but have lost touch with.