For example above is a very dull uninteresting shot of a falling down barn, yes its alright but it doesn't jump out and hit you.
While here after using the software and combining a couple of exposures the colours become so rich and the sky adds drama to the overall image (has that real wow factor or i think it does anyway).
Again here similar to the first example the colours feel dull and the sky seems a little over exposed.
I know that some photographers don't like or don't feel you should alter your work in this way and that how it comes out the camera should be right first time meaning you shouldn't have to do this but personally i think that if the tools are available then why shouldn't you use them to improve your work. I like to think i have all the creative options open to me so i can produce the best work i can.