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Web 2.0 technologies provide a level user interaction. Websites have become much more dynamic and interconnected, producing "online communities" and making it even easier to share information on the Web. Because most Web 2.0 features are offered as free services, sites like Facebook and Wikipedia have grown highly in rates. As the sites continue to grow, more features are added. Some examples of features  considered to be part of Web 2.0 are blogs which allow users to post thoughts and updates about their life on the Web, Wikis which are sites like Wikipedia which allow users to add and update useful online content, social networking which are sites like Facebook and MySpace which allow users to both socialize and create and customize their own profile in order to communicate and share interests with friends and other people worldwide.
Cloud computing is the next stage in the Internet's evolution, providing the means through which everything — from computing power to computing infrastructure, applications, business processes to personal collaboration — can be delivered to you as a service wherever and whenever you need. The “cloud” in cloud computing can be defined as the set of hardware, networks, storage, services, and interfaces that combine to deliver aspects of computing as a service. Cloud services include the delivery of software, infrastructure, and storage over the Internet (either as separate components or a complete platform) based on user demand.