Visual art can be classified into one of three categories: Representational, Abstract, or Non-Representational/Non-Objective.
Representational art, like the image above, is obviously striving to be as true-to-life as possible.
Abstract art, like the image above, is somewhat representational (you can kind of see a recognizable subject) but there is something about it that doesn't quite hit the mark and that could completely be intentional! Perhaps it was created in a stylized way that makes it not look completely realistic or there could be even just one area that is skewed or altered in such a way that the viewer realizes that this is not how the subject would appear naturally. The artist is not trying to be true-to-life and this can be some of the most fun art there is!
Non-representational or non-objective art, like the image above, goes even further than Abstract art from reality. The artist does not want you to even recognize a subject within their piece but instead be taken with the elements or principles they are using..... get lost in the lines, immerse yourself in the range of colors and values, focus entirely on the contrast and emphasis they've created, etc. It's not supposed to even vaguely resemble anything you've seen in life but you will most likely still be moved by the experience.