Social Media is new technology to share information with people around the world. With Social Media you can share your interest, what you like on internet, communicate with people, and share information to your network. Its make more easiest to find article that relevant to your interest.
There is some kind of social media :
Social Bookmark
With social bookmark we can bookmark and share a single page we liked on the web to everyone or just for our friend. This is an online bookmark, so we can access our bookmark everywhere from internet. The benefits from web owner is you can promote your site too. But don't bookmark every page in your site, its a spam act, just pick the best article from your site to promote. Some social bookmark allow you to add friend, making a network and communicate with them. This is some famous Social Bookmark : Delicious, Stumbleupon, Diigo, Furl, Faves etc
Social News
Social news is some type of social bookmark but its focus on news or only certain category allowed to share. Member make voting to article shared, if other like the article it will stay on top, but if not they will burn. You can't bookmark everything you like on social news, but you can get interesting news more easy in this site. Social News site is Digg, Mixx, Newsvine, Slashdot, etc.
Social Directory
Social directory is like social bookmark too but its made for web owner to share or promote their site. If you have a site (usually a blog) you can submit your site here. You can subscribe or bookmark any site only in their directory list. Social directory use RSS feed to gather the article, so you can get update a new article from site you subscribe. Some site have feature to add friend and send message to other member, and the other is not. This is some famous Social Directory : Technorati, BlogCatalog, MyBlogLog, etc
Social Feed Aggregator
Social Feed Aggregator is site to share rss feed. You can submit anything feed you like to this site and share to everyone. You can subscribe any feed from their list too to get any update article from site you like. Most of social feed aggregator dont have feature to communicate with other member. Some of Social Feed Aggregator : Newsgator, Syndic8, Weblogs, Bloglines etc
There is different type of feed aggregator:
Friendfeed : collect rss feed from your friend subscribed.
Popurl : collect rss feed from famous social media, its good site to find interesting article.
Social Network
Social network is build for networking and communicate with other, but you can share information to your network too. Some of famous social network : Facebook, MySpace, Friendster, Yuwie, etc.
Social Status
Social Status is a new kind of social network, its more simple to share information among your network. Social status site : Twitter, Plurk, Jaiku
The other type of social media is Social Multimedia, in this site you can share multimedia format like video, photo or music.
Social video share : YouTube, Vimeo
Social photo share : Flickr, Picasa
Social music share : ilike, Last.fm