Social media
Social media is the collective of online communications channels dedicated to community-based input, interaction, content-sharing and collaboration. Web sites and applications dedicated to forums, microblogging, social networking , social bookmarking, social curation, and wikis are among the different types of social media.
Social Bookmarking
To define social bookmarking is to examine how they work. Basically, links are listed on a network, then whoever has access to that network can search for links that pertain to the keywords that person is searching for. Each link has three keywords associated with it, generally keywords that are optimized on their web pages, and when those keywords are searched for, ideally, it is that particular link that comes up.