Understanding Imagery, proportion, balance, and design can help you recognize the amount of experience and effort the artist put into a piece. ... A piece with poor proportion for example, will often look off, and confuse the viewer, whereas one with good proportion is more pleasing to the eye.
Having an understanding of these fundamentals will help you to determine the amount of genuine skill and effort it took to produce a particular piece of artwork. Not only this, but once you can obtain a knowledge of these basic fundementals, you will have to ability to delve into the deeper, symbolic, emotional implications of a piece of artwork.