An animator is an artist who creates multiple images that give an illusion of movement called animation when displayed in rapid sequence; the images are called frames and key frames. Animators can work in a variety of fields including film, television, video games, and the internet. Usually, an animation piece requires the collaboration of several animators. The methods of creating the images or frames for an animation piece depends on the animators' artistic styles and their field.
Other artists who contribute to animated cartoons, but who are not animators, include layout artists (who design the backgrounds, lighting, and camera angles), storyboard artists (who draw panels of the action from the script), and background artists (who paint the "scenery"). Moreover, voice actors, musicians and other talent may be added as necessary to give the animation additional depth.
Read more about Animator: Specialized Fields, Inbetweeners and Cleanup Artists, Methods