To sum it up, what exactly is this “cloud computing”?

cloud computing
by Carlos de Miguel

Question by : To sum it up, what exactly is this “cloud computing”?
What do people mean when they talk about “cloud computing” in magazines, advertisement, commercial, companies, etc?

Or is my question too broad?
***Also, why is there so much investment going into it?***

Best answer:

Answer by Hugh
The “Cloud” is basically a remote computer that allows you to upload and save your files. It can act as a backup or facilitate collaboration.
Google Docs and MS Sky Drive are good, free examples.

Know better? Leave your own answer in the comments!

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