Many creators hold originality to be one of the biggest values in their art, whether it is music, painting, photography or any other subject. Concerning photography, what is even original when billions of photos are taken and uploaded each day?
Originality is basically the aspect of invented or created works, which are new and can be distinguished from reproductions, clones, forgeries, or derivative works. It is neither copied from or based upon the work of others and is unique in both substance and style, at least according to the definition, I got from Wikipedia. Google continues with the ability to think independently and creatively, and the work should have the quality of being novel or unusual.
Being original comes with a lot of limitations and is one of those aspects of photography only few photographers master.