Composers write music of all types - works of classical distinction, pop ballads, jingles for advertising, or background music for stage, television, and film. It takes lots of patience and a willingness to receive constructive criticism in order to stay in the music industry, and it will be beneficial to have the training and coursework that comes with a bachelor's degree in music composition in order to assist in your success as a composer. Be prepared to master numerous instruments in order to artfully arrange your compositions.