Cloud apps and cloud hosting/PaaS concepts are sometimes hard to explain because we obfuscate simple ideas with fancy technical terms (idempotent anyone?). That's why I like simple 2 minute videos that use plainspeak to explain what a product does, how it works, and what it can do for you. Here is a good example from a company called Ravello System:
Parents typically fail to assign UUIDs[?] to their offspring, instead relying on an inadequately sized pool of traditional names. Furthermore, parents are phenomenally poor at creating randomness, resulting in gross biases in the name selection process. The inevitable result is widespread collisions. My grade eight class had three students named Sean, and three students named Chris. These collisions are mitigated by the inheritance of a surname.