And a marketing ploy to get more money out of you. For now it is free, but it is all part of the plan to have all software and data on a rental system where you pay to use it.
What is the "Cloud"?
That's a quote from a Wikipedia article "cloud computing". It's a big article.The term "cloud" is used as a metaphor for the Internet, based on the cloud drawing used in the past to represent the telephone network and later to depict the Internet in computer network diagrams as an abstraction of the underlying infrastructure it represents. Typical cloud computing providers deliver common business applications online that are accessed from another Web service or software like a Web browser, while the software and data are stored on servers.