The Social Media Plaza has been set up to facilitate discussion and analysis of trends, software, tactics and anything to do with the subject in general.  The use of social media internally at the enterprise level within companies and the tracking and marketing of brands externally in social media is an emerging phenomenon. Social Media has a number of characteristics that make it fundamentally different from traditional media (such as newspapers, television, books, and radio). Primarily, social media depends on interactions between people as the discussion and integration of words builds shared-meaning, using technology as a conduit. Among overall online users, reading others' comments on a Web site and reading blogs are the most popular social media activities. In general, social media can take many different forms, including social networks, blogs, vlogs, social bookmarks, user reviews, video sharing, podcasts, rating systems, collaborative ranking, wikis, comments, message boards, and online forums. Technologies include: picture-sharing, wall-postings, e-mail, instant messaging, music-sharing, crowdsourcing, and VoIP, to name a few. Examples of social media applications are Google Groups (reference, social networking), Wikipedia (reference), Hyves (social networking), MySpace (social networking), Facebook (social networking), Last.fm (personal music), YouTube (social networking and video sharing), Second Life (virtual reality), Flickr (photo sharing), Twitter (social networking and microblogging). Many of these social media services can be integrated via social network aggregation platforms like Mybloglog and Plaxo.