The arts are a vast subdivision of culture, composed of many endeavors (or artforms) united by their employment of the human creative impulse.
The term implies a broader range of disciplines than "art," which in modern usage usually refers only to the visual arts.
The other major constituents of the arts are the literary arts, more often called literature -- including poetry, novels and short stories, among others -- and the performing arts, among them music, dance, magic, theatre and film.
Literary arts and creative writing are interchangeable terms.
These divisions are by no means absolute as there are artforms which combine a visual element with performance (e.g. film) and the written word (e.g. comics).
This list is by no means comprehensive, but only meant to introduce the concept of the arts.
Whether or not a form of creative endeavor can be considered one of "the arts" can be contentious due to the cultural values attached in Western culture to the term "art," which can imply that it is a field elevated above popular culture.