Social media is the collective of online communications channels dedicated to community-based input, interaction, content-sharing and collaboration. Websites and applications dedicated to forums, microblogging, social networking, social bookmarking, social curation, and wikis are among the different types of social media.
Social media is a phrase that we throw around a lot these days, often to describe what we post on sites and apps like Facebook, Twitter, Instagram, Snapchat and others. So you can infer that social media are web-based sites that allow people to interact with each other.
But if we use the term to describe a site like Facebook, and also a site like Digg, plus a site like Wikipedia, and even a site like I Can Has Cheezburger, then it starts to get more confusing. Just what exactly is social media
Some people have more of a restricted view of social media, often equating it to mean the same as social networking (a.k.a. Facebook, Twitter, etc.). Other people don't consider blogs to fall under the social media category.