Social media refers to the means of interactions among people in which they create, share, and exchange information and ideas in virtual communities and networks.






Part of the social media:

• online forums (e.g., DigitalPoint)
• blogs (e.g., WordPress)
• social networking sites (e.g., Facebook)
• social bookmarking sites (e.g., Digg)
• video sharing sites (e.g., YouTube)
• photo sharing sites (e.g. Flickr)
• streaming sites (e.g., Ustream)
• user reviews (e.g., Amazon)
• crowdsourcing (e.g., Wikipedia)
• content aggregators (e.g., FriendFeed)