What is cloud computing?

What is cloud computing? I wrote that as my title today. Since many technology magazines technology or resources that discuss cloud computing, I am interested in knowing what is cloud computing.
According to wikipedia Cloud computing is location independent computing, whereby Provide resources shared servers, software, and data to computers and other devices on demand, as with the electricity grid. Or more simply, the remote computing. Cloud computing is a natural evolution of the widespread adoption of virtualization, service-oriented architecture and utility computing. Details are abstracted from consumers, who no longer have Need for expertise in, or control over, The technology infrastructure “in the cloud”that supports them.
Okay so this is simply like having a local network but in wide range. We can put our data somewhere else, the server somewhere, and our client machine somewhere else. Wikipedia : Cloud Computing
Maybe one of the function I interested is we can put our data securely somewhere else. Or using the online software to edit our data. Hmh I m confuse now.

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