Facebook is the most popular social networking websites that can be used to stay in touch with friends and family. Using facebook you can look up your friends and even see the photos they have uploaded. You can also tag photos in the application. To do this go to your editor page and scroll down to photos. Now click edit settings inside it. At the bottom select 'Allow all fans to tag photos' option and save it. Now when you go to your home page and open the photos section you can tag them and also allow your fans to tag them. This video shows how to tag photos in facebook fan pages.