Web 2.0 and Social Media (Lecture 5)

With the advent of Web 2.0 era, the technologies of social media have developed rapidly。
In my opinion, The typical characteristics of Web 2.0 is concentrate on user interaction.
Upload a video on YouTube, put a photo on Flickr, or write your own view by using the blog. All of these things do not require some special technical expertise, just need to connect to the Internet.