Ask A Ninja shares his views on social media in What is Podcasting?
What is Social Media?
Social media describes the online technologies and practices that people use to share content, opinions, insights, experiences, perspectives, and media themselves.
Social media can take many different forms, including text, images, audio, and video. The social media sites typically use tools like message boards, forums, podcasts, bookmarks, communities, wikis, weblogs etc. (source: Wikipedia - Social Media)