Web 2.0 refers to the interactive nature of the Internet. Users have more ways to create and collaborate, changing content and sharing information, with simpler tools and software. This video describes how Web 2.0 has gradually developed.
The Cloud is a metaphor for the Internet. Cloud computing uses web-based services instead of software, resulting in less expense for businesses and individuals. An example of this is GoogleApps which includes word processing, spreadsheet and presentation applications.