What does a star mean?

I am suppose to be in a 4 star hotel presently here in Erbil/ Arbil Iraq.
What does that mean?
This means that a Motel 6 is a 5 star hotel in my opinion.

If you know how they get these designations. Please email me the
information or links: hoboonntheroad@DELETETHISyahoo.com

I am in a nice hotel for the price. A/C TV.
But I believe fitted sheets should be standard and a few other things.
One of these days I will get all these ideas together and come up
with a good rating system. The always focus on the amenities and not
on the safety of my computer and money.