Web 2.0
It's all about creating collaboration and communication.
In Web 1.0 we learned that websites *actually* needed to provide real value–a splash screen really wasn’t enough. In Web 2.0 we’ve learned that just because you can invite a friend doesn’t mean you’re engaging in social networking, and that just because you can publish your ideas to a website doesn’t mean they are: a) good b) true or c) interesting to anyone other than yourself.