social networks are sites where people discuss with others on various personal/business topics, share videos/photos, create new friends working in the same business or having same interests, you can visit some sites like - facebook.com, myspace.com, hi5.com, orkut.com create an account and what facilities these sites provide to interact with other people.
Social network are the networks where you can meet your friends , relatives and also different people all around the world. Here you may discuss , learn and many more things you can do. Its the best for living the social life and thus are aware about the world and whats going on. You may share what you like for eg videos , photos etc . Visit sites like facebook , orkut , twitter , linkedin , eZdia , hi5 , myspace etc. and start using it and you will automatically understand more better while using it
You can check out ping.fm. sign up and you can add your social network sites and bookmarking sites. It has a great list of social sites that you can use to ping your website or your blog post, articles and everything..
Social Networks is a easy way of website promotion.Which you get short tram lost of results. likes that Twitter, face book, digg.com, ident.ca etc many website available on net..so start hurry up....