When thinking of art, most people think of paintings(Dali, Monet, Degas, Kadinsky), sculptures and architecture (Roman, Greek, Gothic).
But art is much more than that.
Art has had a great number of different functions throughout its history, making its purpose difficult to abstract or quantify to any single concept.
This does not imply that the purpose of Art is “vague”, but that it has had many unique, different reasons for being created.
The different purposes of art may be grouped according to those that are non-motivated, and those that are motivated (Lévi-Strauss).
Something is art when it moves you, and has meaning whether by
Poetry, Music, Dance, graffiti, paintings, sculptures, photography, drawings etc.